Nice mate! Love the pose of the guy on the left after the thing breaks.
Here are some things that stood out to me:
1) As he's reaching to grab the guy's head, his thumb pops out...looked strange to me
2) When the things break and the dude lets go of the other guys head...the guy on the right's head does a pretty sharp poppy/bouncy motion before it settles back down...I see what you're going for (secondary bounce after the let-go)...but I'd say tone it waaay down
3) The guy on the left goes through his chair a few times

...it doesn't look like that part (along with his hands) has been tweaked too much though so I'll let it go....BUT ONLY THIS TIME!!!!!
4) The can and ashtray bounce pretty darn high considering the amount of force that the guy is putting into bouncing the guy's head. I'd say have them sort of shift/jiggle off the table, instead of bounce
Great work though! All of my comments are just minor things...the rest looks great!