Tighten your Cast Control knob, and then throw smoothly without jerking the rod at all. Practice this until you are comfortable with it. Then start loosening the Cast control knob, bit by bit, until you become more confident, to open it up more. The Cast Control knob controls how fast the spool will spin. If you jerk the rod, the spool will spin faster than the sinker is taking line off the reel... = overwind or a burnt thumb.