Players are distributed in the room. The task is to walk every which way through the room at increasing speeds. The leader announces "Step 1". We walk extremely slow through the room, as if it were extremely slow motion. Nevertheless everyone always has, in each step, one's own tempo, that can deviate considerably from another's. After a while the leader says "Step 2": We walk a little faster. That goes on until "Step 10", when we walk across the room as fast as possible.
The game leader request that everyone stands still; the second part of the exercise follows. He announces some random steps and the players try to remember which tempo they had chosen in the first part of the exercise for that step and they walk in the corresponding tempo across the room.
It can be successfully combined with walking with phases.