Mr. Casselman's Opus 

Plot twist: the mayo was on

This is why josh writes all the marianas trench songs...

This DOES need to be a ringtone

Someone should go on American Idol, or X-Factor and sing this song in their exact voices.

The replay button died an honorable death. Like the coleslaw.

I love how high Mike's voice gets

Mike sounds like my uncle when he says "THE MAYO WAS OFF!" 😂😂😂😂

This is why I love these guys. I was crying from laughing so hard. You'd think Casselman would learn.

Im sitting here shaking from laughter and my brother is staring at me omg

Thank you guys for making me feel better on a really crappy day. You boys always know how to do it. I can't stop laughing, though I feel bad for Ian because I'm laughing so hard.

I was bawling in tears and then I watched this and could not stop laughing. Thank you MT, you can always brig a smile on my face :3

I haven't seen this in so long, and it's still so beautiful.

Cannot get enough Marianas Trench!! Everyone is so crazy and hilarious!!! LOVE IT!!

I got to meet them on Friday. Their last show of the Ever After tour was in Green Bay Wisconsin and i was there it was the best concert ever!!! I hope to see them again someday :)

recieves mayo package at diner, starts singing "THE MAYO WAS OFF!" XD these guys make my life :D can't help but love them

*standing ovation with tears in my eyes* BRAVO! BRAVO!

i love how this video has more views than the Ever After live video :) This is perfection neatly packaged into a 1 minute and 32 sec video. Awesome job Mike and Matt....

Mike's voice is surprisingly nice.

Thanks to this video, I always call coleslaw closeslerrrr

Even when they sing with ridiculous voices, they sound amazing!

I feel like a totally bad Trencher for forgetting about this iconic of a masterpiece of a video! 😂

im so glad that ian was still able to play the show last night it was beast!

matt recently ate the coleslaw :/ poor matt

Mike's laugh at the end. that's just beautiful.

First the elevator song, now this, yet ANOTHER thing to get stuck in my head forever haha love you guys -3

Both this song and Matt's Ham song is tagged with guacamole! Gotta love Matt

i just love them soo much words cannot even begin to describe

I will forever be amazed my the voices they can make

I love how at the start mike is in a complete zone, than they just break out in the song lol.. I dunno how they did this without laughing, too funny.. love Matt's "old man singing voice" priceless :) I can just picture Josh waking up to hearing them singing this lol he musta been thinking what the hell, lol....

This never gets old...

And this is why we love you guys.

I cant get enough of this video

the emotion behind this is incredible, i don't see why people are laughing about it, its such a deep meaningful song...

Matt sounds like Toby turner!

Beautiful, just beautiful. Good job guys!

The face Mike makes to reach the high notes ! LOL

This is why I love you guys.

This is by far the best video on RU-vid

Marianas Trench i honestly love you so much, i could right a book series but even that would not be enough to describe how much i love you! thank you so much Marianas Trench for your music, your talent, your humor, you as people and absolutely everything else you have given this world!! i am pretty sure no other fan could possibly feel like i do about MT

Pure perfection brought to you by Mr. Mike Ayley and Mr. Matt Webb. :) -3

If you guys did a concert with just songs like this, you'd have a sold out concert.

Can't get this outta my head!!

I love how Mike picks his nose at thr beginning! Lol

Well Josh was sleeping... Maybe Ian was the one who went to wake him up.

If they released this song I have a feeling it would be a bestseller on iTunes by FAR

this video never fails to cheer me up

omf. this cracked me up. this is why i love you guys.

that awkward moment when your in a small store and you start singing "He ate the coleslaw, the mayo was off the mayo was off "

i cant get over matt singing in that voice :P

im defenetly going to have that stuck in my head on monday for my final exam.... great

Seeing these guys in concert in about 4 hours!!!!!!!!!!!!!!!

and this is why i love them.

This is my new favourite thing, ever!

If you guys play this at one of your shows, I will love you even more!! ... if that's even possible.

I hope they make more vids like this while theyre on tour for FTM.... of course I would not want a Mr. Casselman's Opus II... because that would mean Ians sick.... these vids are seriously PERFECTION

THE MAYO WAS OFF!!! Lets just take a moment to applaud Mike for his vocals...

Plot twist: The mayo was on.

I love you guys. Day is made.

Mikes shirt says: Save the planet its the only one with beer! Lol so true

Probably the people who were expecting to see Josh's gorgeous face

This is just perfect. This is why I love you

My mom pointed out that Mike picked his nose at 0:02. I just d'awwed because I'm just that great of a fan and everything they do, I love and adorable of them. xP

Lol it's so nice how they write a song about Ian's food poisoning due to the mayo being off :p I hope Ian feels better :) -3

Mike's smile at the end. Oml.

mike looks so awkward in this oh my i love this

I think, mike should sing more, He's a fantastic singer, I would love to hear him sing more

Haha this was completely ridiculous in completely the BEST way! LOVED it hahaha! :)

That was just...heavenly.

Mike can definitely sing higher then Josh... omg. I actually never realized what an amazing singer he was.

*tear* That was beautiful!

I am more proud of this than anything that has ever been made in my city ever including cheese curds.

New single.......I love it

I think there should be an ep with the mayo song, the elevator song and the ham song.

God every time I watch this video I laugh so hard my sides hurt.

You can tell Matt uploaded this by looking at the tag xD

Matt has pretty good vocals too.. "HE ATE THE COLESLERRRRRRRRRR"

- holds hand to chest- Oh mayo

Matt: Hee ert der colsler Mike: the mayo was off! the mayo was off! me: I WANT SOME!

Watched this a good 20 times since it was posted THIS IS AMAZING. Poor Ian, ive had nasty coleslaw before too, sick for a good 2 days lol :) GO M&M!!!!!!! :)

Lets take a moment to appreciate that beautiful ending :)

Pure Gold.

LAWLS I LIKE ALL YOUR SONGS BUT THIS IS THE FUNNIESTLOLLOLOLOLOLOLOLOLOLOLOLOLOLO

.....I must show everyone this song! There best song yet!

This pretty just made my entire life!

YESS HIT THOSE NOTES MIKE 🤣🤣

Next #1 Marianas Trench single right here! -3 love you guys so so much!

This. Is. GOLD!

Oh my God. I wish I was on that tour bus.

I died when Matt started singing at 0:45!!

Josh was right, these two should be the writers from now on. :)

he tweeted tht there were almost 1m views minutes after my friends and i met him and asked him to sing this for us... when he laughed and didnt sing... we started thn he went in the tour bus and tweeted abt the song.... event tho he didnt say it... i kno we reminded him abt it :p

I can't stop watching! LMAO!!!!

Love Mike's shirt

omg this is too funny.. I love these guys....

1)"Oh what comes out of your bumhole might be bold , UHH!" - haha mike UHHH , at the end of that 2)Matt's voice, hahah

This needs o be a ringtone

i have no idea why i cry everytime i watch this... like i die laughing but then i also cry... love toy marianas trench, more than life itself !!!! -biggest marianas trench fan

lovelovelovelovelovelovelovelove you guys:) cant wait to see you in july!!!!!!!! :DD

after matt started singing i couldn't stop laughing

Lol. Matt trying not to smile.