Everyone’s probably seen or done it at least once at the pool: the “hey watch this!” trick, such as when two New York City men first took a series of fast, deep breaths, then held their breath underwater in 2011. Both drowned.
It’s not unusual, the New York City health officials report.
They call it “dangerous underwater breath-holding behavior” or DUBB for short. Other people may call it just plain dumb, but in fact most of the cases involved serious training. The victims may not have realized just how much danger they were putting themselves in.