explosions, armors, helmets, and decapitation

[misto]

i see sometimes that people's heads, brains, skulls, etc. randomly have a chance to survive gibbing. this is good. i would like to propose a further nuance to this

if someone is wearing a good protective helmet, their head should have an increased chance to escape intact

if someone is wearing strong protective armor (indy armor, bomb disposal suit, whatever) but no good helmet to go with it, their head should be obliterated or removed by a strong blast, leaving a decapitated corpse