Whales. You just don't mess with them.

Why? Because they're enormous and could either crush you with ease or swallow you up in one gulp.

While the people in this boat weren't necessarily messing with this whale, they were on his turf while out on some kind of whale-watching expedition.

Mr. Whale decided to make sure they knew their place by giving one of the passengers in the boat a little love tap. IN THE FAAAAACE!!!

Source: Free Beer & Hot Wings