Underwater heart attack
Even though you’ve spent months or even years on getting your scuba diving certification, there’s no guarantee that you’ll be 100% safe when you submerge your body underwater. This person shared a horrifying story that involved a diving partner who experienced a heart attack while underwater.
The guy was incredibly lucky that the dive team that accompanied them was trained in dealing with such a situation. They were 15 miles from shore at the time, and getting the guy professional medical help in a timely manner was clearly out of the question. After that, the heart attack guy sold his gear to the OP and promised to tread shallower waters instead.