V1 Cuts
First, I remember one senior pilot who had "flipped" several twins doing engine failures on take off old timers
will know who I'm referring to.
I had my first real introduction to repeated V1 cuts in the Flight Safety King Air 200 simulator.
You learn that V2 is a minimum speed. If the engine goes bang at the exact speed at max weight
your V2 needs to be increased to get it to climb, retain directional control
to take it through those imaginary goal posts at the end of the runway.
You program the sim to fail exactly at V2. The sim is the only way it can be practiced
on the runway safely. It's probably the most important task you can practice in a sim.