Plus if he had been in the US an outlet in the bathroom would have had GFI protection
Wrong answer.....
Depends on when the home was built.
Circuit breaker or fuse box, both are designed to immediately halt the transfer of electricity once a surge is detected...........
With that being said, Apple iPhone chargers are specifically designed to shut off when a surge such as being dropped into a bath tub should occur.......
Be that as it may, any time I read of an individual who decides to run an extension cord from his hallway into the bathroom and plug it into his iPhone charger then set it onto his chest while he sits in the bath tub, I'm immediately suspicious of any claim that it was merely an accident..........