If it's like the one I saw on You Tube in Europe, it will have a trap door drop at the top, like the Bomb Bay at Wet N Wild in Orlando. If you're not familiar with this, you get into a a little capsule, and lean back standing against the back wall with your legs and arms crossed, then the floor falls out and you drop down the freefall slide portion, until you enter the "loop"
Found a bunch of pics of the one in Koln, Germany at an indoor waterpark, one is of the safety sign, weight limit is over 88 lbs and under 286. Pics include someone being let out of the trap door between the drop and the loop.
in my opinion when I went there over the summer (when i went it was like 60 degrees and empty) I found it to be quite fun. Although the new for 2009 attraction "The Curse of the Crypt" was pretty lame and I was really disappointed.
Curse of the Crypt was just a retheme of Noah's Incredible Adventure which wasn't good in the first place. That's why they added the mirror maze, to try and make it better than what it was. Even then it's not that great, especial because it's a dry ride in a waterpark.
13 - GateKeeper 14 - Millennium Force 15 - Enchanted Tales with Belle