*Knock Knock*

"Who's there?"

"Interrupting coefficiant of friction"

"..Interrupring coeffictian of Fr-"

"MU!"




...

...

Don't get it?

Scroll down.









Mu is the coefficitant of friction, therefore interrupts it, this could also be:

"Interupting cow"

"Interupting co-"
"MOO"

Took me a while to get it. Didn't really make me laugh though =\

I get it. Ew, I don't want to be reminded of Physics.

i still don't get it

AHHAHAHAAH i love it. i'm going to tell all my friends. wow. nerdy jokes are the best.