Killer orca

[snopes]

Comment: There's a story about orcas that we've heard on two different
Alaska cruises. Shortening it up as much as I can, this how it goes. At a
marine park (don't remember if they ever said where), the orca handlers
noticed the orcas practicing a new behavior that the handlers had never
seen. The orcas were swimming around the tank fast, in formation. When
they reached a pretty good speed, one of them would launch itself up into
the air, flip over and land on its back, on top of the back of another
orca. The handlers couldn't figure it out. Then one day, when they were
doing the orca show, and one of the handlers was riding around on one of
the orca's backs, the orcas went into this routine. One of them flew up in
the air and crashed down on top of the whale carrying the guy on its back,
totally squishing the guy. The cruiseline naturists that tell the story
say that it's a case of premeditated murder, since orcas are smart enough
to plan this out. Have you ever heard of this one? I've been curious about
it for years, but never got around to sending it to you.