That’s so unlike a Maine Coon, they’re normally so placid. I can’t quite believe it, but you’ve seen it yourself, so... they’re big buggers and can be fearsome hunters, but even so this is unusual.
Pocket is doing well to stand up to him though. Size isn’t a key issue in cat terms, it’s attitude, and she seems to have plenty of that!
Btw, Coonie’s furry back legs are known as pants, short for pantaloons. Hence my girl being called Ms Fluffypants by the wife :)