I work in the corporate marketing department at Schlitterbahn Waterparks'. This past Sunday, "King of the Hill" parodied our parks. We have a pretty good sense of humor here and found most of it funny. :)
They changed our jingle and a few things to keep from being sued...but its us. Our tag line is "The Hottest Coolest Times In Texas", they changed it to " The Hottest Coolest Waves In Texas". Also the tower they throw Bobby off of looks just like our signature ride "The Master Blaster".
I don't know how long FOX will have the episode on their web site, but here's a link if you want to watch it.
http://www.fox.com/fod/player.htm?show=kingofthehill