Why did he do that?

[mainbutter]

I feed my 28” Ball Python today and it did a peculiar thing. It ate the mouse and had gotten it all the way down. I was just about to put him back into his enclosure when he lunged at and bit his own tail!

What was that all about?

My cat used to attack her tail all the time.. lol

My guess, he just didn't realize that tantalizing(or annoying) thing he wanted to bite was himself. Feeding mode can bring about odd behaviors.