At the end of the day, the psychologists open the engineer's room first. Pencil and paper are unused, but the walls of the room are covered with dents. The physicist is next. He calculated how exactly to throw the can against the wall, so that it would crack open. When the psychologists open the mathematician's room, the paper is also full of formulas, the can is still closed, and the mathematician has disappeared.
Someone gets an opener and opens the can.
The mathematician crawls out. The physicist's horse comes in last. I don't understand it. I have determined each horse's strength through a series of careful measurements. The statistician's horse does a little bit better, but still fails miserably.