To control a forehand drop shot, most players need to reduce their swing dramatically. The two guys who have developed an incredibly skill-full forehand drop technique are old master Karim Darwish and new master Mohamed El Shorbagy. We've had several examples already here on the blog as demonstration, but this is the first one where such a shot is filmed from the frontwall.
Normally most of the players need to reduce both their natural backswing and the speed of their swing when they go for a drop shot. Try to pause the footage between 0:06-0:07 and you will see that basically Darwish's (back)swing is higher and quicker than he would do for a normal drive: he really fakes a big and hard shot; the only (huge) difference is that whilst with a hard paced shot you generally also have a big and round after-swing, by playing the drop-shot you have to brake your swing and stop your racket in order to hit the ball softly; pause the footage again a fraction later at 0:07 to see how Darwish used his body balance in order to help to stop his racket with as much control as possible.
Be assured that latest hot gun Mohamed El Shorbagy has been watching/observing this forehand technique ever since his childhood days every single time he got the opportunity to watch the 'big guys' (Shabana, Darwish, El Hindi, Abbas) training.