Simple and classic challenge. If one marshmallow falls out its over, you can try to use your fingers to keep it in as much as you can (that's what she said)
sneek up on your friend and put pop rocks in their mouth and watch their reaction! lol But plz don't let them choke!
Quite simple, purchase said altoids, put the whole tin of them in your mouth and see how long you can hold them in there fore