A silly experiment I made. Basically, in Insanity Please Doom, I made Lost Souls into explosions which detonate when they see the player. This made the Pain Elemental spawn 3 explosions on death. I wondered what would happen if I gave the explosions the Pain Elemental's death codepointer? A NUKE for Doom, that's what! It spawns trees to (eventually) block the explosion from spreading endlessley, otherwise a single explosion would lock the game. The trees vanish after a few moments. On some big levels, like MAP15, the game can get locked anyway.