““Besides, you have to remember that the thinner air out here slows down the intellectual process, the result of less oxygen flowing to the brain.' He grinned and looked at her sideways. 'Is that a doctor thing?' 'No that's a Scully thing... The doctor thing is, get some sleep... or you'll be useless in the morning.' He nodded as he waved a weary good night over his shoulder, sidestepping a garden wall just before he tripped over it. Another wave- I'm okay, I know what I'm doing- before he disappeared into the passageway.””
