amm.... in my opinion you shouldnt do it, it would break the game in every aspect. Imagine being a cop trying to hunt down reds that are jumping up and moving like woaoooaoawoo(<wtf lol)
Maybe tho you could implement it as a special xmas event - make a Christmas tree and do king of the hill!
(but i dont think there is any possible way to make it this soon, maybe next Christmas, who knows!)
EDIT-i just realised that there is no way to phisically move players in SA:MP. Cock.