In GTAV, when you're in the shower, you can sing to get bonus xp, so I told my friend that in a public session. He went into game chat (he was probably like 14 at the time) and started singing 'Just a Friend' in a really high pitched, voice cracking way, and got about 6 seconds in when someone heard him and said "What was that?" Then about 6 other people started laughing because we went into a full lobby where they were actually doing something.