I watch this video:
http://techsnap.net/2007/couple-on-jet-ski-catch-major-air-over-flooded-spillway/

And think about this place:
http://fogonazos.blogspot.com/2007/02/largest-drain-hole-ever.html

...and get a massive case of the shivers.

Holy shit.

Scary, but awesome.

I liked the comment about using the exit tunnel as a half-pipe.  I think that strictly speaking, this was a full pipe.

I always thought it was called a "half-pipe" because it was only, well, half a pipe.

That's right. But if you look at the picture of the exit, you'll note that it's actually a full pipe.

Half pipes were built to artificially mimic real pipes (because building a full pipe would be hard and of debatable value). Here they're using a full pipe...

Hmmm... could you go through that drain? I'd probably want a helmet and some heavy-duty skin covering. But damn.. getting shot out that spout would be wicked fun.

Read the comments. The Civil Engineer says you'd probably be killed by the turbulence.

i don't one would skate the full pipe with actual water in it.

I'm surprised more kids haven't tried it (swim out in the middle of the night, etc).

There are mentions of some deaths (lots of mentions of suicides). While the photo may look engaging, look at the people in the second pic for some scale. The pipe is 72ft across and the spillway is 700ft long. While there are stupid people, I'd hope the scale of the thing and the roaring of the water would overcome all but the bottom of Darwin's ladder.

I have looked around for reports of fatalities wearing scuba gear, but haven't found anything yet. May have to write a letter to the sherriff's office to find out.

Actually I believe the point of building half pipes was at least partially to generate air. :) It was only a few years ago that the top skaters in the world got so good as to actually do a full loop of a pipe. (Easier on a BMX, apparently.)

(Yeah, I used to watch EX TV a lot for lack of better things to do.)

Your chances of surviving a morning glory spillway are of the same order of survivng Niagra Falls - so one day some nut will try it in a custom-designed kevlar bodysuit or polycarbonate capsule covered with little wheels and most probably die.

It's tricky to fence them off so there is a large exclusion zone.