Maybe you need a confidence boost. Go find some short assed ballers who suck bad and then practice dunking on them

Do this often until you build up enough arrogance to try it on bigger and better players.
Or just practice by yourself until it becomes 2nd nature.
__________________
Height 5'7 Reach approx 7'0
BW average 140lbs
Training Status: Suspended
Injury: foot fracture, dislocation of joint
Vertical Training Forum:
www.theverticalsummit.com