Dropping Mentos into a two-liter bottle of Diet Coke is the oldest trick in the book (it even has its own Wikipedia page!). You already know exactly what will happen, but it's still exciting every time. If you don't, it has something to do with the candy releasing carbon dioxide in the soda and then science happens and it explodes.
Now, what happens when you dunk a man wearing a suit made of Mentos into Diet Coke?
What became of this man? TBD. But now your morbid curiosity is sufficiently satisfied.