Ok, my understanding is, to achieve this Trophy, Two excavators must being Digging 6 and 11, and you get trapped in the receiving room, you
must kill your self (teammates must be on other side of map), and when the next round starts you end up with them(Other side of map).

The only problem, I dont think there is two excavators, it looks like its just one, on tank tracks, that moves where it needs to go(6,11 or the bio dome).

Every time I have tried I have NEVER seen it dig two places at once.

What am I missing?