The bar that you supposedly hang onto on one of those Stratosphere rides gets really hot (coz it's in the middle of the fookin desert and it's made of metal) so you can't really hold it without getting burned.
Scared s**tless though, so 4th degree burns (yes, I just made that up) were the lesser of two evils.
If you're into rides, the Sahara and New York, New York boast scary coasters too. If there's still a funny smell, that's me, I apologise.
If you visit the Hoover Dam on a bus tour, you only get two hours there. I recommend not going on the guided tour of the power station. It takes about an hour and a half, and is nothing special. (most of your time there will be spent queueing)
Better spending the time enjoying the amazing view from the top, and sides of the dam, the visitor centre, and the Hot Dog shop
