1. Buy pumpkin on Saturday. Carve. Save seeds in container with snap down lid. Add water so that they will be rinsed clean. Think vaguely that you will roast them, although you have never willingly eaten a pumpkin seed and are not about to start.
2. Ignore mom who nags at you that you really should do something about those pumpkin seeds.
3. Repeat #2.
4. Have mom uncap container one week later.
The smell is thick, indescribable, and awful, in both the old and new senses of the word. A thoroughly rotten stench.