first shot works well, I'd just adjust the right guy's elbows so they are not so mirrored and bring in some asymmetry in both guys' eyebrow. When the screen left guy looks at the right guy he could raise the browse a bit too, so you get pose changes in the face as well during different actions.
2nd shot: that last forward and backward is too even and too similar to the previous ones. I'd do something like this:
- wait with the last move until around x455, then don't go further than what you have now at x442, tiny pause, then go back. That way you have "long - long - pause - quick" which is contrast wise better than "long - long - long".
3rd shot: same comment for the eyebrows (now that the animation is further along you can put the polish and finishing touches on it for the appeal). I'm still not buying the right guys' driving as much. He would turn a bit to the left and then to the right and then straight in order to get out of that spot. I would cut out at x780 and on that cut he's turning the wheel to his right (counterclockwise for us) after a little turn to his left.
4th shot: I'd actually add 10 more frames to that pause. Did you change the timing for that since last time? (I could just check... :) ). It's a tiny bit short, but maybe that's just me? The pause length in this version feels good:
5th shot: right guy's "woohoo" on x1001 has his fist in front of his face. You can move is screen left so that we can see his face and have a cleaner silhouette. What is he doing at x1058? Adjusting his imaginary tie? I wouldn't cross silhouettes at x1107, is there a way to separate them during that moment?
Left guy feels very floaty/spliney until he falls out of the car (which looks awesome) and what is he doing at x1118? I'd make the movements more abrupt, like he's in shock but not dazed the way you have it. So it's more sharp and then at the end he softens up and falls out.
Hope that helps!