[Threshold]

*facepalm* right...

pawn Код:

if((newkeys & KEY_JUMP) && !(newkeys & KEY_HANDBRAKE) && !(oldkeys & KEY_JUMP))

Perhaps this? This means if they're not holding KEY_JUMP and KEY_HANDBRAKE at the same time, and KEY_JUMP wasn't the last key pressed/held, continue.

Just a proposal, but it seems like it should work.