Not entirely happy with this myself, I simply say, "Good fortune smile on you.", and exit the room.
Letting out a hard breath, I'll indicate for our slightly diminished company to form up and move on to the next unexplored passage.
I get back into my formation spot and head out down the tunnel with the others, I will continue to look for anything odd or strange along the way.
"Right, lets see what this door has for us, shall we?"
Preferably with Grant in tow, I'll head up and check for traps, and listen for anything on the other side, before trying to open it. If locked, I'll make the attempt to pop open said lock.