“So, you are going to Niagara Falls. Are you going to go over in a barrel?” was the question posed by almost everyone I told of my upcoming adventure.  Annie Edson Taylor, a 63-year-old Michigan school teacher, was the first to do it in 1901, but only after testing the waters (and the barrel) by sending her cat over first. Both survived and since then 14 more people have gone barreling over the rim.