The Toughest Challenge In The WORLD 

Imagine getting paid to say "It will cut you,and it will hurt"

I really hope this becomes a tradition with the same team. Really entertaining to watch!

This is how my grandparents said they went to school with their friends

Boys: This is so hard! Cameramen: 🏃🏻🏃🏻🏃🏻🏃🏻🏃🏻🏃🏻

I can only imagine how good a shower felt

I love how Ollie is just failing at everything and it’s honestly just mood-

It’s a tradition to come back to this every once in a while...

Who else really wants to do the obstacles but knows they can’t run 12 miles 😇😂

Damn all of that for a headband who am I kidding I would probably do that for a headband

Chris's schedule: don't post for weeks and then post twice in a day. It works.

Me: running 12 mile tough mudder Guy in high vis: It wiLl cUt yoU And iT WiLl HuRt

“Do not enter, shark infested water” *don’t tell me what to do*

*it will cut you, and it will hurt.*

There RU-vid, I finally watched it, you happy!?!

Me: I wanna do this! My core and upper body strength: *am I a joke to you?*

It's pretty cool that you got Kevin De Bruyne to do tough mudder with you.

Sign ~ “tread carefully” One of the boys ~ “don’t tell me what to do”

From 8:32 onwards a bit when Ollie decked it I couldn't stop laughing. I was crying😂😭

No one: Literally no one: Mark at Everest 2.0: I am speed

Hardest course in the world *Cleaning your room: Am i a joke to you?*

I was thinking about trying out Tough Mudder but after watching this... think I might need to train for another 57 years

Ollies that one guy in the squad 😂😂😂

mark and brandon: the atheletic ones chris: the short one ollie: the other one

great job to Chris,Olly,Mark,and Brandon however it was hilarious how Olly decked himselfe so many times

10:09 that guy in the background made it seem like child's play...🤣🤣🤣

Chris you should start a series with those 3 friends where you take on different obstacle courses and challenges. Like if you agree so Chris can see 👍🏽

12:15 replayed this bare times 😂😂😂 'chooobs' 😂😂

Who else has watched this like 7 times

Nobody is acknowledging how nasty that ice water is

This is like elementary school field day but on steroids

Who’s here after Chris said he lost 100k on this video 😭

October 2019 anyone, or is it just me watching this for the 25th time lol Edit: April 2021 anyone, or is it just me watching this for the 26th time lol

10:09 watch the guy in the blue/orange shirt on the next lane. He makes it flawlessly

Meanwhile I am sitting on my lazy arse drinking a milkshake on my couch.

The toughest course in the world Ninja warrior: am i a joke to you

chris: hardest challenge ever mr beast: am I a joke to you

this seems so fun to participate in, unfortunately, i am weak.

Ollie is an absolute legend

I CANT EVEN WALK ONE MILE AND THESE PEOPLE JOGGING 12 MILES WITH OBSTACLES

I watched this 6 years later and Chris looks like a baby

99% Of the comments : Wow 2 uploads in 1 day

3:30 when he don’t high five her back 😂😿😿

Not only did ollie fail the blocks, his shorts failed him

Who else is watching this in coronavirus lockdown

Looks like footballs top drawer went into Chris's bottom drawer

This is my definition of fun. No joke.

Ollies face 🤣👏 4:40

I like how head & shoulders are with toughest mudder but head & shouoders are like cleaning suppies

Who else would want to do this but ur a kid? lol the fact it has been 3 years and I still get notifications for my one comment:) my greatest achievement

Ninja warrior next…?😂

8:30 so freaking funny i was laughing so muchhh

I could not stop watching the bit with the moving squares where Ollie dives in from the squares 😂 just couldn’t stop

The toughest challenge in the world is finding the right girl

16:18 that poor guy in the background...

Looks like you guys had fun time. So cool to do a challenge course with friends, and have it on film. Well done guys.

This looks like how to basic outdoors 😂

Chris It would be a good video if you did this next year

I died when ollie slide in the water over the block did anyone else😂😂😂

I really want to see a kids version of this 😂😂😂

my parents describing how they got to school:

2 VIDS IN 1 DAY IS THIS REAL LIFE?!?

Did anyone else think of the Lion King at the wall? Just me...... ok, I’ll go now

This was my first Chrismd vid I watched

The way he just denied that little girl 🤣

‘Hardest challenge in the world’ For me getting out of my bed in the morning

Hey Chris. There are several things I want to say to you so bare with me please. First of all I just wanted to say that it is amazing that you volunteered to do this course. The amount of training, and physical and mental preparation must have been insane, and just the pure level of difficulty and physical demand that this course has is huge, and you're a huge inspiration to me. Second of all, a quick side note. The production of this video is brilliant. The cinematic shots, the multiple angles, the seriousness interrupted but silly ChrisMD-style humour... Fantastic. This is in my opinion your best directed video. And third of all, thank you for the double upload. I know it seems stupid but I know how hard it is to maintain a constant upload schedule so I really rate you uploading twice. So basically... Thank you for being the best RU-vidr and thanks for making my life better.

Who else is watching this during lockdown 😂

My personal highlight of this vid is Ollie falling over at the mud like 1000 times

Why is 8% of the competition dressed like Waldo.

TWO VIDEOS IN ONE DAY Christoph I'm proud of you 😂 and now to find my headphones so I can actually watch them 😩

Always watching Chrismd videos, bigups bro

Loved this! My kids and I laughed so hard.

*Damn double upload wow!*

I’ve watched this video at least 5 times and I don’t even know why 😂

Now its just 9:13 still watching this wonderful video it is making my day so awesome that i couldn't imagine it will ever happen Thank you so much guys for making this interesting video.

The toughest challenge in the world is figuring out how your gonna say to your crush that you like her/him

I would be able to do the obstacles 20x in a row but i ain’t runnin 12 miles

Lol rip Ollie throughout the entire video Yes I'm late idc alright

Legend says that this was so far the best advertisement of a product ever!!!

This is the only place where you can see Kevin De Bruyne doing the tough mudder

Please do more videos with mark and Brandon in

10:07-10:26 This guy next to you is a beast!

Ollie cracks me up. The block bit had me dead.

The music on the monkey bars hits different 2021 recommended

I can do that, hold my beer *SLIPS AT START*

2 uploads in a day? Everybody loves Chris.

Every time i watch this i Laugh really hard when ollie does the mud thing

No jokes this is the best video i have seen in months, good work lads!

Everyone talking bout how he's done 2 vids in one day but I'm still shook that I think that's the first time I've heard him swear

So... They're walking and running with wet socks?

I don’t know why but I’ve seen this video so many times and it’s literally my favorite video ever

Hands down one of the best videos ever

Does anyone feel bad for the shoes that got sacrificed for this video?

*When you realize that the hardest challenge in the world is actually living*

Who else feels like Ollie is a comedy show

The hardest challenge is paying attention during school and home work

Ollie falling around in the mud gave you a thumbs up and me a great laugh😂😂👍🏽👍🏽 Thank you Ollie lmao

Imagine 2019 Chris doing this course. He would absolutely destroy it

If I did that course Ollie would be my spirit animal just failing everything😂

Imagine if they tripped at the last moment of climbing Everest 2