Been there, done that. Lol.
A little disconcerting when your food is trying to slither off the plate, then proceeds to try to crawl back out of your mouth. Like many other animals (including snakes), the body still moves without the head.
But hey, I was younger and dumber, and couldn't turn down the challenge from the locals

.
While on vacation (12-13 years old), I recall my first time ever, seeing someone eat a baby octopus live, as in literally fresh caught out of the ocean while standing thigh deep in the ocean.
An older fisherman in some country in Asia (can't recall which) was fishing in the ocean and caught a baby octopus. We were fascinated, and he offered it to us (he didn't speak any English). When we declined, he mimed something we took to mean, "Good to eat", then chomped right into it while we were all standing in the ocean. Watching it wriggle as he chewed it was...
Then, years later, I got to try it in a restaurant. Lol. Raw octopus is incredibly chewy.