Monday Night Combat Wiki

Cheston goes down on all four and starts pounding the ground, heavily damaging and throwing all hostiles away from him. It increases his base movement speed by roughly 50% but prevents Cheston from using weapons or other skills. If used midair will give a surge of speed but will drain much faster, this is called 'rampage jump'.
It can also be used offensively to do damage to stationary bots or turrets, to trap a player in the corner, to attempt a ringout or to knock opponents away from friendly pros.
Leveling increases damage per tick and reduces cooldown.