James Prudenciano, 28, was on a date, hiking along a trail in New Jersey when they slipped over the edge. When he fell, his watch called 911.
“I'm actually holding on, this watch is right at my face and it said, '911 what's your emergency.' And I’m like, ‘Wow, this is an angel,’” he told Inside Edition,
There is a special setting on the Apple Watch called fall detection. If it detects a fall, it asks if someone is OK, and if there's no answer after about 60 seconds, it alerts 911.
The watch also sent a text to his mom, who was listed as his emergency contact. The message said: "hard fall SOS. I have called emergency services near...” and the watch provided his exact location.
Rescuers found Prudenciano at the bottom of the cliff with serious injuries.
His back was fractured in four places and he also suffered an ankle fracture.
He says the hike would have ended in disaster if not for his Apple Watch.
“Thank God I bought this thing, if I didn't have it, both of us would probably have been dead that day,” he said.
All Apple watches later than the series 4 have the automatic SOS feature.