I thoroughly enjoyed the IOA version (though haven't seen the USH one yet). It isn't necessarily scary, but after aseveral trips and rides through, I admit I was fascinated by how nicely the whole thing comes together. No, not really scary, but I thought it was tons of fun. I keep missing Popeye because I went when it was under rehab and then for HHN this past year (where the queue was turned into the Ship of Screams), so I'm looking forward to that, but Ripsaw Falls is my absolute favorite of all of the flumes I've been on so far.