The Zeus has an un-missable CT so a few shots later your front armor blows through and your mech is instantly destroyed. It's happened about 5 times and each time I had no hint I was being fired at from behind. With any other mech the sound comes from behind (for me) and I instantly defend against the attack so the damage is minor.
Edited by Lightfoot, 18 March 2015 - 02:29 PM.