k i fixed the tag mismatches you had, but it returned me 3 other mismatches
ill take a further look
btw heres the fix, you forgot the "Float:"
Code:
if(gHasJumps[id] > 0 || gHasJumps[id] < 0) {
new Float:origVel[3]
new Float:newVel[3]
get_user_velocity(id,origVel)