Holy Cow! That is nuts
I used to have one that would bob at the top and then spit water out
I have a baby porc now that I am not sure I want to have my hand in the tank yet. Whenever I feed, he charges to my fingers like a mad man. I have a tankmate in there with him now that I need to move but I am not sure how he is going to react.
He did puff up once too. One of my "bad" crabs is in the tank with him grabbed his tale! He kind of terrorizes them too though. He has not killed one but he harasses them.
I love the little porcs