Had one on Sunday night while working at a restaurant. He says "Before you start, I'm a big fan of Derren Brown and I'll be watching very closely to see if I can catch you out."
Anyway I managed to impress him sufficiently and afterwards he said the immortal lines "What I like about Derren is how he explains what he's done afterwards."
"Yes," I say, "he's very good."
"There's one amazing thing that he said once," continued the spec, "if you think of a card hard enough and for long enough you begin to give clues away with your body language!"
"Yes," I say, "it's amazing isn't it?"
I have the patience of Job.