i have an oddly similar story. a bunch of guy we played football with were flying together, and one of them fell asleep with his mouth open. another guy had these european cookies that had chocolate in the middle, and lightly placed one in his mouth so it was just resting there. the other passengers took turns laughing at him, and at one point, the flight attendants were calling each other over to look.
well, when he woke up, he quickly bit down. the chocolate in the middle of the cookie was runny because it had been in his mouth for a while, and when he bit into it, chocolate oozed all over the front of him. he was extremely unhappy.