In a room at PMC-MOO for instance I once ran across a cappucchino maker that filled the functions of a real-life cappucchino maker, but which also concealed the entrance to a separate room. At Lambda-MOO there is a mirror in the hall outside of the main living room that, when looked at, sucks the user in and deposits her into a room in which all of the type is reversed, and which requires the user to enter the out command backwards 'tuo <enter>' to reach an exit. And in a notorious case of cyber-rape and psychosis, a "voodoo doll" was constructed that allowed a very disturbed user to commit virtual acts of violence against other citizens, an act which resulted in the "toading" or execution of that user's character and which also resulted in the institution of juridical processes at Lambda-MOO which have also been instituted at DU-MOO. See Julian Dibbel's fascinating article "A Rape in Cyber-Space" in The Village Voice (Dec. 21, 1993) for an intriguing and informed account of the events surrounding the case of the sinister Mr. Bungles and his doll.