I worked in kitchens for seven years, and I'm familiar with the adage that a dull knife is more dangerous than a sharp one. I understand the rationale, which is that a sharp knife will do exactly what you want and expect it to do, while a dull one will slide down the side of the tomato and into the fingers holding it, or whatever. But that still assumes that the person holding the knife knows what they're doing. Careless or clumsy people will find ways to cut themselves, and in their hands, sharp knives are definitely more dangerous.
Whenever I pick up a knife, if I'm not sure, I check its edge. Yes, you can do that with absolutely no chance of cutting yourself, which some people just don't get, including a surprising number of people who've chosen to work in food service.. But I always want to know what I'm working with, especially if it's potentially dangerous.
Anyway, that gif is amazing. It's hard to imagine a knife that sharp.