A Magician Could Hold His Breath Underwater

Riddle: A magician was boasting one day about how long he could hold his breath underwater. His record was 6 minutes. A kid who was listening said, "That's nothing, I can stay underwater for 10 minutes using no type of equipment or air pockets!" The magician told the kid if he could do that, he'd give him $10,000. The kid did it and won the money. Can you figure out how?

Answer: The kid filled a glass of water and held it over his head for 10 minutes. Source: https://riddles.com/316

A magician was boasting one day about how long he could hold his breath underwater. His record was 6 minutes. A kid who was listening said, "That's nothing, I can stay underwater for 10 minutes using no type of equipment or air pockets!" The magician told the kid if he could do that, he'd give him $10,000. The kid did it and won the money. Can you figure out how? — A magician could hold his breath underwater by Anonymous Riddle