I thought $5 Dollar Hollar was gone after Uber showed up in town. I was thinking the other day that it was great when you could go anywhere in Havasu for $5. it is probably $20 Dollar Hollar now. LOL
I have been to that one also. JFK came out for the opening of the dam (or whatever they call the ceremony). They have pictures at the site, of him there for the opening.
A person would just be pinned against the iron fence. The two I have been to, both have barriers in the water to keep boats a good distance away. If someone is determined to swim near the hole, they will do it.