The Motorcycle Drill (Flatten Wrist)

Flipping happens when your wrists release the clubhead past your hands before impact, usually to square an open face or rescue a stalled body turn. Fix it by keeping the lead wrist flat (or slightly bowed) through the strike, squaring the face earlier in the downswing, and rotating your body through impact so your hands can stay ahead of the clubhead.

Where the ball starts is governed almost entirely by clubface angle at impact, and how it curves is governed by the difference between that face angle and your swing path. To shape shots on command, fix your start line first using a gate a few feet ahead of the ball, then introduce curve by changing where the face aims relative to where the body is aligned. Never work on start line and curve in the same session.