[Jstylezzz]

Probably with SetPlayerPos(x,y,z+4); where the 'z+4' is the original z height plus the amount to increase it with, thus lifting the player into the air. You might also be able to use SetPlayerVelocity for this, although I never looked into that function so I have no idea if that would work.

You could add a PlayPlayerSound to add a sound effect for it as well.

Hope this helps you in the right direction