[Kwarde]

Default gravity is 0.008 and not 1 (When I was a beginner I made that mistake :P)

Quote:

GivePlayerMoney(playerid, -1000); GivePlayerMoney(playerid, 1000);

So it removes 1000 dollar and then gives it back. Use 'killerid' instead of 'playerid' at the second one.

p.s.
Try gravity -1 ^^