Yea with the roundhouse invisible torp, Chuck can really hit you. But now I have to learn just a bit about the Infected. The trick not to be blown up by him is if he targets at you pull away over 10KM using EM. Let him continue to target at you while other takes advantage of shooting the cube. When he will switch targets then jump back in the fight and when he will target you again use EM and repeat. Should be useful if you practice alot and learn to adapt their moves.