You hit the switch to close the door, but a few shots get through. Pompey gets hit in the shoulder (again) which was healing over. Kael gets hit in the leg. Steve manages to avoid getting hit and Andrei is hit (also again...). On the other side of the door you can hear the guards charging, got to be a way to slow them down...
K, Pompey heads through the door first, scanning the immediate area - it's clear. Steve follows next, he's safe. Andrei steps through the door way and....
I'm not sure what you want to do here. if you're prepering the grenade do you want kael to go through before you and then you throw the grenade through the door before it shuts or throw then Kael gets through?