Instead of giving his kids an iPad, Heenan gave them the device's empty box along with a straightforward note saying: "April Fool! HAHA." From the mortified expression on his kids' faces, the prank was undoubtedly a success.
It may be the effervescent, child-like quality in you that makes laughing at a youngster's cruel joke on their parents okay, but it takes a certain type of person to enjoy the faces of the two extremely sad kids in that photo.
Still, it's kind of fun. On the other hand, here's one type of prank that may actually be unforgivable.