Darkness's Laboratory is a science lab featuring a potion where different color combinations produces side effects for Sam - including making him invisible for a short time. It also features the dumbwaiter which Sam can ride to the kitchen (if it is on this floor). It also sometimes features a sock.

Sam will turn visible again if the player waits too long or if Sam enters the following locations:

  1. Returning back to potion counter
  2. Exiting through the door outside the Lab
  3. Returning back to the kitchen
  4. Trying to Exit Darkness's House down the ropes
  5. Going upstairs to the Doors of Knowledge
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