[Frapster]

it's one thing to dive off the side of a pool and quite another to dive off a 3 foot or 10 foot board into 6 feet of water.

[Ramius]

Well, yes. But still... kids can still get a disastrous neck injury in a four foot pool diving from the edge. That's what they are talking about in this story. Six feet would apparently be far to deep for these folks.