When <trooper> fall from air.
"These are new weapons-grade Y-fronts. With these, the war is already won."
Bounce Back is an unlockable passive Ability. The Trooper takes no Fall Damage, gets up immediately, and gains +100 Initiative upon doing so. With enough Health Points, he should be able to counter Faceboot and Wrestler, as well as any explosives or shotguns, with a swift retaliation.
Bounce back also works well with Vehicles.