looks like he can be boomed and there is a reference to it on the achievment list.
P.s Sniper rifle mmmmmmmmmmmmmmmm
Interesting... So the survivors could explode a boomer in the tank's face, and the tank then looses vision and gets attacked by the common infected? Sounds cool!
But I hope this doesn't give rage quitters yet another way of screwing up the game. ie: A Rage quitting boomer just vomits over his infected teammates!