Snorkeling in the Bahamas once. Go down, hang out underwater, come up...first thing you do is blow hard thru the snorkel to clear it of water. That lets you take the next breath that you really want by that time. After a deep, long dive I surfaced, cleared the snorkel and took a quick, deep long breath...just sucking down that good old air. Apparently, a big horsefly decided to land on my snorkel as I took that quick inhale. Yep. Mouthful of Bahamian horsefly. Didn't get stung...they don't sting. But talk about a weird sensation, inhaling a horsefly. Pretty impressive how all of a sudden you don't give a sh*t about breathing...spitting takes over. And my buddy, Johnny, thought I had lost my mind, of course.