Just that: Stomp with the heel driving down into the opposition, and can include body movement for added power (so long as it does not sacrifice control). Stomping methods are also common in lead attacks and moving forward for attacking in Krav as a base of power.
This information is for Brady J. Frey's personal training records & is not intended as a replacement for live, professional Krav Maga training. I am in no way responsible for your disregard to this warning. Please contact me if you have questions.