At Sonic, one of my sons got a Ripley’s Believe It or Not “Spectacular Sports” pop-up booklet, and on the “Extreme Sports” page is a photo with the caption, “Kris Holm takes extreme biking one step further. He completes amazing feats, like riding on the edge of a volcano and on the rail of a 200-foot-high bridge, on a unicycle!”
I choose not to believe it.
We believe what we choose to believe. Nobody can make you believe anything. Therefore, I will not post links to either of those feats here, thought the bridge one is in a lot of videos and hard not to find… 
On the “Sporting Species” page is a water-skiing squirrel. Now that I believe, for our neighborhood rodents frequently stage Esther Williams-worthy water shows.