iShowSpeed & Mark Rober Try EXTREME Science Experiments.. 

The most unexpected collab ever.

I love how Mark's treating Speed like a kid in a candy factory

6:30 props to rose for sacrificing

The way he looked at the camera and lip synced not actually actually at the end when speed said a flies reaction time is faster by a millisecond, 😂

Props to Mark Rober for spending time with the make a wish kid

Speed swearing in front of mark feels so illegal 😂

Whenever speed does his weird shenanigans, i sort of feel bad for mark because the :| face or saying "thats right" was pretty funny

05:59 Bro really said that Electrons are positive and then Mark said that das rigjt I'M Dead Lmao

Mark looked like he was rethinking his life choices everytime Speed was trying to explain the science

Only Mark can throw things at Speed and get away with it 😂

Firstly its a cool an interesting Video i think you are ging to Hit the 10 million subs soon because you are a cool RU-vidr to sum up its a cool video idea

I love how I show speed when he got the popcorn his hand was burning and he was screaming😂

Imagine how much better Science class would be if Mark was your teacher

Props to Mark for having the patience to deal with irl Curious George

32:26 is when the explosion occur

“my rule of don’t break stuff still applies right now” lmaoooo

One of Speed's best streams. Shout out to Mark and his crew for setting up the experiments for all of us to see.

11:04 Speed: Does it hurt or not men Mark: What's your hypothesis Speed: The density of it may hurt.

if you’re wondering. Mark’s “devil’s toothpaste” recipe is literally the same as the elephant’s just with a higher concentration of hydrogen peroxide

Mark was definitely trying to kill speed during the second experiment

The fact that Mark was able to shoot speed with tennis balls, a soccer ball, and a water balloon without him being able yo get mad is genius

Mark has more patience than I could ever have.

Mark: HOW BEAUTIFUL IS THAT CHAT …. like a little bit inappropriate 😭😂 had me dead bro i was thinkin the same thing lmaoooo

bro turned into ishowscience

“Did you know flies have a faster millisecond time than us?” Mark under his breath: “not true” lmao

I just love how mark is still being so sweet to speed when he goes off having fun and being all hyped up

Bro forget he is a engineer not a scientist💀

Speed is like how you do that🤨😮

the patience mark has with speed is insane, if i was in that scenario, i would lose my temper.

W to Mark for being a sport and allowing the language, knowing that kids will see this one too (because his names in it). Small L for Speedy for not being a little aware that Marks audience might see this

Bro this is a very good video thank you for videos like this

16:41 funniest part

I love how Mark is secretly correcting speed by whispering to the chat😂

Mark Rober had serious balls to invite speed into a stream with ten hours worked into science experiments Edit: Mom I’m famous!

2:39 hey dont touch its very cold *speed processes to touch it* AHHHHH😂

0:24

14:04 bros walking like the classic joker 💀

Speed & mark is like an unlikely duo but they have such good chemistry not pun intended and speed is actually respectful to mark and mark just has to put with speed tomfoolery as well 😭

Mark saved speeds finger dude said we’ll do it later and made speed forget abt it and they never ended up doing it

Renaldo on his shirt at 17:48 lol

watching this feels like community service. cant imagine marks feelings for going through it

27:39 poor mark

Mark isn't even irritated by speed. He's just super patient. Which is super cool.

Bro said imma throw it at your face💀

18:29 📸well well well speed

Speed is like a lab monkey Mark uses to test his experiments.

12:07 bro driving crazy 😂😂

After this session mark needs to revise all the knowledge he gained over the years😅😂😅

mark is such a wholesome guy

Speed thinking liquid nitrogen is water after Mark explaining it's not water several times and looking more disappointed each time was the highlight of this Collab

14:10 bro speed wasn’t kidding

18:45

33:11 Speed says “Flys have a faster reaction time” Mark says under his breath, “That’s not true”

12:12 slavery in modern world would exactly look like this 💀

Bro is about to touch nitrogen ☠️💀

Going back to his roots. Respect 18:35

18:42 of course he does

mark has more patience than I thought..

Honestly it was the most unexpected collab,I agree

Ishowspeed remember zedotts 😂😂😂😂😂😂😂

17:25 what was speed doing😭

Legit the most unexpected collaboration ever that became one of the best collab

He gets revenge in the 3rd section for swearing with the gun

1:27 you can just see mark rober get progressively more confused💀💀💀

Mark is honestly one of the best people on youtube im glad hes got so far

18:34 Well Well Well💀

Mark took all the revenge on speed for swearing with his experiments lmao

ishowspeed collab with mark rober, before gta 6 i would have never imagi ned

Bro literally put the glove on his hand and started using his other hand 🤣🤣🤣 4:49

5:58 really helped me for my chemistry exam

22:13 that's some serious patience

No speeds were hurt in the making of this video

Yeah mark is right about the liquid N2, you can put your hand in it. It's called the Leidenfrost effect. Basically the same way you can run your hand through a fire very quickly. I regularly get backsplash of N2 when pouring in lab, as long as it doesn't pool on you you're completely fine. If you get more than just a little tiny bit of splash and you get enough for a drop to form and it settles somewhere on your body, you're in trouble though. The way they've done it is so dangerous though hahaha I can't believe Mark let Speed touch the pot lmao. Also sublimation is solid--> gas just btw. liquid to gas is just vaporization

Love how Mark Rober said it was like a worm when describing the devil’s tooth paste then you have speed. 26:30 this was just an unusual collab and Mark Rober really held his composure and patience with speed. Speed cussed like crazy which for him is normal but it feels so wrong hearing him say that in front of Mark Rober especially since his audience is family friendly. Great video though had me dead 😂

The collab no one expected but everyone needed

11:18 I like the part where he just drives off 😂

i like mark he is just so nice and charming guy

33:18 mark just playing along but making sure the audience knows

when mark shot the ball at speed i laghed at speed when he got hit by the desk and it was so funny😂❤

Mark: "Do not touch this!" Speed: *proceeds to touch it*

21:48 Sodium Motor-ride😂😂

Pause at exactly 6:05 someone in chat called him Walter black

speed tryna be genius is funny asl bro 😭

14:00 Bahar aao bahar

28:41 my Alexa setting itself to volume 10 after this💀

16:26 has to be my favorite part 😂

I love how you can see mark get frustrated somtimes😂

If Mark told Speed the formula to Devils toothpaste, Speed would prolly announce it to his whole chat

lol this was actually a pretty wholesome speed stream. i just found it really funny whenever mark said "chat"😂😂😂😂

30:33 "thats the correct answer" 😂😂

Bro when i watch vids like this i really start hating my teachers more and more i swear 😂😂😂

They should have an online show together! They’re polar opposite’s but it’s the content that counts!

When speed starts talking all in scientific terms but he's actually just mashing words 😂 it really gets me 😂

28:35 "lets do another prank on chat" 💀

speed: “full speed at me?!?” mark: yeah of course!!

5:57 its like a adult playing along with a kid💀💀💀💀

Now we need speed to collab with vsauce now that will be truly the collab of all time

(19:13) when he said "Mark where did u go" he kept that sus voice tone, that shit was funny asf 😂😂

The unexpected collab but needed

Mark literally became a boss in a boss battle in the turret part