This is one of those videos that makes me wonder how we, as human
beings, have survived for so long.  Even I know not to do what this guy
does in this video uploaded by krato901
on October 12, 2009:

I have very little experience with horses, but even I know to NEVER stand directly behind one--much less smack it on the butt.  That's just tempting a chance to weed out the gene pool.

But, you gotta admit that the guy has stamina.  He looked dazed, but not too messed up.

Perhaps this is equine revenge for the horse in yesterday's Animal Video of the Day, which you can find here!