bonus mission (Mortal Kombat X)

The keys for the kicks and punches must be pressed quickly, and then there are two keys if you have reached the desired level of strength, or you must hit yourself when the time is up.

KRYSMAK
This question interests me. Time is up and he hits himself, are there any keys or where to press at all so that the blow would be stronger

Maxim Ipatov
Yes, I already told you you need to press the keys or you play on the joystick, on those that are under your kicks and with your hands you press them quickly and at the same time or alternatively.