Force shields. We have breathable air for about... A hundred-fifty feet. Hundred? No matter. The straps don't go farther than fifty, it's perfectly safe. [that's what he remembers. he's used them before that's how he knows they'll be alright]

Besides, she's got our backs. [pats the wooden doors fondly]

Here! [hands Clara one of the harnesses, then struggles to put the other on himself]