This video may not be to everyone's taste — it's pretty awful. This is an octopus dish served in Hakodate, in which the poor raw cephalopod is presumably dead, but when soy sauce is poured over it, it's triggered to writhe its tentacles.
I do not approve. Either it's cephalopod torture if it's still alive, or soy sauce is the secret ingredient for zombie reanimation*. And then…no one eats zombies. That's just disgusting.
*I am considering adding a new suggestion to my funeral instructions, though.