It's not acceptable to pass gas in another person's face.
Lance is at his friend's house for a sleepover and his friend has already fallen asleep.
Lance wants to prank his friend.
Lance puts shaving cream on his friend's hand then tickles his nose.
Lance places his rear end near his friends face, wakes his friend up, then farts in his face.
Lance's friend is awakened by himself when he inadvertently smears shaving cream on his own face which he finds hilarious.
Lance's friend is offended and immediately starts to fight Lance.