I've seen it before; I think Ronald Acuna will do that after a big hit/play sometimes. Apparently it's called the "too small" taunt. I never thought much of it until I saw Okonkwo and Wojcik's add-on of a stomp at the end. Seems to take it way overboard and I think it's understandable if someone finds it offensive or unsportsmanlike.
Any further insight or explanation of the stomp would be appreciated.
Are there more important things for me to worry about? No. haha. Yes, of course. Thanks for asking.