Trimming the stab and return of yoke to neutral should be taught to pilots. Because after trimming if the yoke is not returned to neutral it becomes additional elevator input to trimmed position. Rostov on don accident the pilot on a go around as expected pushed the yoke forward to control the pitch up but he used a prolonged forward trim of some 12or 14 secs and held the yoke in the same position putting the aircraft in a 65° dive from which recovery wasn't possible.