Idk why but i want that knife..holy crap can that thing cut. Kept waiting to see if he would lose a hand or a finger...sadly no. But i did get hungry...so that's something. Lol
...and i fade back to black.
That's called a cimeter. One side of my family back in Italy were butchers. When I cooked professionally, I used mine fairly often breaking down meat.
Watching that video, I was amazed at the butcher's dexterity and courage. Pulling the knife towards him through that side of beef had me thinking he was about to wind up in either the emergency room or morgue. But that's how the real pros did it.