Descr1: 1. A person approaches the corner of a shack
  2. There is a pit at the corner of the shack
  3. The person drops into the pit
  4. The person appears to be falling yet his position does not actually move
Descr2: 1. The player is walking in a house
  2. The player walks over top of a basement shaft
  3. The player falls into the basement shaft
  4. The player hovers near the top of the basement shaft