To summarize, a tourist impaled himself on a metal fence trying to climb said fence at the Colosseum.
https://www.wantedinrome.com/news/rome-tourist-colosseum-railing-fence.html
I'm trying to think of stupid things I've done as a tourist and I'm pretty sure most are just being careless or inattentive, i.e. maybe not checking carefully when crossing a street in Naples or focusing on my phone/camera instead of my surroundings. However what about things I'd like to do, or have done that may result in harm. I'd like to get into a shark cage to see great whites, if I had the money I'd take one of those rockets into space. Mountain Biking comes to mind as the riskiest thing I've done in my younger days; going too fast down a hill, or biking alone in remote areas where I'm on my own if I get hurt, or a bear or cougar finds me. Is that any less dumb than what we're thinking about Vlad the self-impaler right now?