You will put one ingredient in the sandwich, and once we have 50 ingredients, the guy who posted the 50th ingredient will eat it.
Example:
1. A shoe
2. A cake
3. A flower.
I will start:
1. A Baseball
25 a fascinating new test element, It's never been used for human testing because, apparently, contact with it causes heart failure. The literature doesn't mention anything about lump-of-coal failure, though, so you should be fine.
31. Another sandwich, this time it's a magical sandwich with a sandwich inside, with a sandwich inside and so on, but they have no flavor, but beware, eating it will make you fat as if you had eaten every single sandwich inside it (infinite fat)