Bowling has never been a sport to me. In my book, it's not a sport if there isn't a serious risk of injury. The only way anyone has injured themselves by bowling is by accidentally taking a sip of the wrong beer in a Arkansas bowling alley.
Even this painful looking fall doesn't re-qualify it for the sport category. The only reason he AND his ball ended up in the gutter is because he forgot to let go of the ball. If he had let go to early on the back swing and made his opponent eat the bowling ball in mid-air, it wouldn't just earn it a spot on my list as a sport. It would also earn it a spot on the cover of my next and most awesome Christmas card.