[Sherlock glares at the Postman when he tells them to 'stop struggling.']

Some of us don't have a choice. The way my mind stores information is based on concrete places back home. Nothing can change that, except for me.

[He pauses.]

Explain what you mean by "crashes". You make it sound like we're part of a machine.

[His headache is getting stronger. He should have taken a higher dose of cocaine before coming here. He doesn't want to waste it, though.]

Why are we here? What is our purpose?