u/Euphoric-Badger1351

I was playing multiplayer with 2 friends and then suddenly we saw one of our friends did the ground attack (like when you look at the ground and attack) and the animation was holding katana from the sharp part and attacking with the handle of the katana. we tried to do it ourself and we did the classic ground attack animation. few minutes later my friend lost that animation and i had that animation. when i tried it was the same handle attack and it spawned pickable little rocks and also pennies rarely. then i lost that animation too. I am asking is this animation an glitch, bug? Or perhaps an easter egg?