FORTIFY

In a situation where a Heavy Warjack (Ironclad) is Slammed into another Heavy 'Jack (Centurian) that has Fortify cast on it, the following happens: Both 'Jacks take damage, Centurian is not knocked down due to Fortify, and the Ironclad would not be knocked down either because at the moment that the Ironclad's movement would end, Fortify would kick in and prevent it from being Knocked Down.