deathrun_simpsons_final is one of the three maps you get in the Deathrun For Fretta addon from Garrysmod org.
The map has many hazards like getting squashed and crushed by Duff boxes. When you go through the Krusty Burger sign at the end there are three doors. Easy, knife and old. Going through the easy door takes you to a small blue room. You can't go through the knife door(maybe it's a glitch). And going through the old door is like the knife door(i don't know why i cant go through them). This is a pretty good map and when you die, Homer's d'oh! sound plays.