My work computer is really really slow.. When there's lots of blood and collisions, I quite often don't get to see the whole replay (it times out, I don't hit space to advance).

A neat side effect, though - Playing in a really long server (140 ticks per move), if my opponent submits his move really fast I can actually see a brief snippit of what will happen replay in my window... Then quickly rewind and then I'm shown my move interface.

I beleive this is because the opponents' moves are broadcast to my client before the animation is complete.