"What can you lie down on, get high on, and go to the police to become?"
"What?" said Claire, totally confused. Andy tried to explain.
"It's a joke. What can you lie down on, get high on, and go to the police to become?"
Claire closed her eyes. This was either going to be really clever, or real dumb. Maybe both...
"Dunno. Enlighten me."
"A bed, a plane, and a detective."
"Or grass" mentioned Brian.
"Sorry?"
"Grass. You have to understand the British to get the last one, but it... works..."
Brian tailed off, wilting under the gaze of the other four students...