As part of the game I follow a series of white corridors to a room where a bear in a gorilla suit is unleashed. We lure him into the down escalator and take the stairs ourselves; at the bottom just a few bloody scraps of hide get caught in the grate. In the second trial a pale man with a long pointy head looms over me but is subdued by conversation. The third trial is the most elaborate: two friends from school have stocked a full mock convenience store in the basement according to a principle which I and another friend must guess. Doubles? No. Insides? No. But wait, I realize suddenly, half expecting a wall to flip up and offer me a new car. Everything here is a Hybrid.