Can Apocalypse class machines begin too pass gas when taking damage to vital components?
In all seriousness, I think it would be cool and make Apocalypse class machines a little more intense during combat, leaving a toxic mist wherever they go simply because you decided to take them on.
It would also make you think twice before beating one with melee as they begin to ooze.
I also think some machines should set on fire before death, like prototype class because they are still in the test faze. And if they big and topple ontop of you, you should take damage.
Possible over charge of FNIX class and above classes like more speed or reload rate before death, the gitters, excessive smoking and sparks.
Just some thoughts