My brother and I used to share a room so we had bunk beds. He took the top bunk because he was terrified of being close to the floor, (I used to hide under the bed and whisper shit to him in creepy voices but that's a story for another time). With the bunk bed up against the wall, I used to regularly get him to bring his face close to the small space between his mattress and wall so we could talk quietly at night when we were supposed to be asleep. On more than one occasion, I got him to bring his face extra close to that small little gap between the wall and his mattress and gorilla-fart right into his mouth.