I've heard of dolpins playing by tourist boats (and I've seen proof in the movie Titanic, obviously, duh), but Orca Whales?! Since when did they have the "let's play" attitude??
The last time I checked, they were called "Killer Whales" for a reason, which leads me to believe these whales weren't showing off their impressive belly-flopping skills for the tourists; they were really just scouting their next meal while out for a tirp on the high-seas. These tourists narrowly escaped with their lives! (kidding) (but maybe not kidding)
Check out this ridiculously cool video from the whale-watchers who got a very up close & personal experience of Orca KILLER Whales in the wild.