He held his breath for over 5 minutes?!
Ya right.
Not a bad movie considering the set design was non existent. Not much of a budget. Was shocked it was a (semi) true story at the end.
Kate Winslet held her breath underwater for seven minutes and 14 seconds while filming "Avatar 2"
https://www.snopes.com/fact-check/kate-winslet-breath-underwater/