He barely holds back the urge to punch Yunlan after the back slap, but he gets a pointed glare. Jiro cannot be down here with all these horribly cheerful people for another week or he'll scream.

"You think there's just a password that opens everything?"

That would be a much quicker escape than trying to build a bomb and blowing open one of the tunnels. Which is Jiro's escape plan, should they be stuck down here for another couple of weeks.