80mph Tennis Balls Shot at  

AJR just trying to stay calm while pure chaos is happening around them. Mark looks absolutely delighted 💀

They looked absolutely terrified 😂

Mark Rober : YEAHHHH WE DID IT BOYS! AJR : We?

Mark is the only person that can hold a music band hostage

Mark Rober: "We did it boys!" AJR: *_visibly disturbed_*

AJR looks so traumatized 💀

Mark Rober:"We did it boyyyss!!!" AJR: questioning thier lifes choises for 300+ tennis balls to be lunched at them at 80MPH for them to sing a song IN BODY ARMOR

Reminds me of barbarians throwing the axe above the bard's head for them to play music

Mark, are you holding AJR hostage?

Mark delightfully screaming “WE DID IT BOIS” to a terrified AJR is a hilarious image I will not be forgetting anytime soon

The best crossover in RU-vid history

AJR, blink twice if mark is holding you hostage

Mark: "WE DID IT BOYS!" AJR: Terrified and Frozen at place"

I'd love to see how Mark treats bands he DOESN'T like

We need a actual song with this tennis ball throwing ,chaos making, life threatening drum

You introduced me to ajr thanks!

This feels like those scenes where a supervillain has their favourite band perform for them while under duress and the supervillain is like super stoked the entire time it’s happening and the band’s like terrified.

At this point, I think Mark has become psychotic

Mark: "We did it boys!" Ajr: *Visually and physically scared*

💖i love ajr's music💖

Mark descending into madness, becoming Vsauce

"WE DID IT BOYS!!!" 😂 "...." 🥺

I love how the band is so scared and mark is like : Yeah. Great song. Do better next roll. *Waves hand away*

This gave me a real “Ok Go” vibe

Legend has it, If you live long enough as a science enthusiast, you slowly become Vsauce

This guy is just completing side quests at this point, deserves an award of perfection honestly

What instrument so u play ? Mark robber : its complicated

I love how only the middle one looks so terrified but the rest were happy

AJR is gonna make a song specifically about the trauma they experienced during this video.😂 Edit : I dont want to be this guy but mom IM NOT FAMOUS.

When engineers have that mad scientist energy.

I was seriously surprised to see AJR there. They are also my favorite band 🤝🏻

Chris berry seeing this ( he’s the drummer for Ajr): 😅😅😅

" whatever you do, stay exactly where you are!" The look "....what...why?"

I don’t think AJR signed up for this mark 💀

Ngl they should do this at a concert

"We did it boys!!!" AJR: confused internal screaming

mark’s kidnapped ajr and i absolutely love it

AJR: *instant regret*

Mark: "We did it boys!" AJR: "Now you wont see me again"

Calmly singing while fearing for their lives is perfect

Mark : absolutely delightful 🎉 AJR : regretting their life choices💀

This is the chaotic collab I didn’t know I needed

I'm fine My Brain: Oh My Mind

This is why I like mark rober, he's pure chaos with a degree in engineering

The crossover I never knew I needed.

Ajr blink twice if Mark is holding you hostage

This is something I didn’t know I needed in my life.

Bro el mejor video neta, de mis creadores favoritos y mi banda favorita

AJR: *struggling through the modern day equivalent of D-Day Mark: *happiness noises*

I think they’re scared of Mark

Mark Rober: WE DID IT BOYS! AJR: *i have markroberaphobia now*

This crazy thing makes AJR an amazing band Extreme in action.

AJR isn’t quiet often, Mark has achieved quite a feat Edit: at this moment the like count is 696. …nice

Mark is on the verge of becoming a Willy Wonka kind of guy 😂

Mark rober:WE DID IT BOYS AJR: traumatized

Bro AJR has pretty much ALL ABSOLUTE FIRE songs. They did "don't throw out my legos", "Yes, i'm a mess", "world's smallest violin", and SO MANY MORE BANGERS

I feel like AJR is being held hostage for content

AJR and Mark Rober. Couldn't have thought of this collab in a million years, but this is a welcome surprise!

Air be looking like kidnaped kids while Mark is just trying to have fun

Are we *not* gonna get a version of “Yes I’m A Mess” featuring Mark the engineering lord musician?

Mark: All giddy with glee AJR: pretending like they didn’t just wet themselves😂

The evolution of Mark Rober into Dr. Heinz Doofenshmirtz has begun. I’m all for it.

Mark casually using real life redstone

Mark was so happy while they were extremely traumatized 😂

AJR is just trying to survive while Mark is having the time of his life Edit:thanks for the likes

Ajr new song: "World greatest torture" ft. Mark

POV: MARK MISSES and hits the money target -AJR: run boys

The look of disappointment and’s disgust and just the awkward stare at the end says they’re never coming back

Mark Rober: YEAHHHHHH WE DID IT BOYS! AJR:**suffering from PTSD**

Mark is literally just a child soul in an adults body and I love it

“Whatever you do, stay EXACTLY where you’re at,” AJR: “what..?”

Обожаю группу AJR

AJR being his favourite band is so on brand

The collab I didn’t know I needed

AJR is also my favorite band this is so cool

Yes I’m a mess is one of my favourite songs by AJR but also AJR are one of my favourite bands

AJR being Marks favorite band doesn’t surprise me in the slightest. Such middle school principle energy😂 I love it

loving these ajr videos, my favorite band and my favorite content creator all in one

This is peak nerdiness and I love it

in case anybody needs the full song it’s called Yes I’m a Mess by AJR

Love how AJR just looks absolutely caught off guard by Mark

If that's not a standard AJR music video, then I don't know what is. Love this.

Tbh I like the middle man's dance So muchhhhhhh

bro is a real life minecraft redstone master

Ryan seems the most chill out of all of them 😂

I love how Mark easily makes music out of chaos 😂

Mugged❌ Primed ✅

AJR is amazing

"WE DID IT BOYS!" them: 💀

it’s pretty clear that ajr is marks favorite band

Bro proved why he is engineer 😅

Mark: 😃 AJR: 😑

Mark finally went the mad scientist route, running experiments on AJR

I like how Adam enjoyed that and smiled at the end while the other two were deeply disturbed lmao

“What instrument do you play?” “Tennis ball snare drums”

I never expected this Collab and I love it

When your music video director is an engineer...organized chaos

He’s gone mad. Mad with the ability to build anything.

The one in the center looks permanently traumatized 😂

bro its the real life redstone expert💀