Ive had variants of the live fish thing, and also very recently deceased shrimps. I have also had the horsemeat, but very lightly cooked and thin sliced, like carpaccio.

I havent had raw fish sperm but I have to say that baked blowfish sperm is wonderful, although I didnt know what it was until after I ate it. The sake with fugu fin in it is absolutely rank. They light it on fire when serving it so the smell doesnt gag you. The flame burn away some of the smell. I like fugu sashimi and sushi quite a bit. Also, boiled fugu with vegetables and rice is very nice.