I have the record for the most times in one day down a six story waterslide @ Raging Waters Sacramento (unless someone was crazy enough to break it) -83.
As you slide down with that much speed ( I was going the same pace) , Its pretty hard too fly off of the slide with the force from the speed keeping you in in it.
Funny I have a phobia of free-fall rides but as long as I'm on something , I don't have a problem with tall waterslides or roller coasters that go straight up in the air (Superman The Escape, Six Flags Magic Mountain
)