Yeah. Never try and catch a falling knife.
I work with box cutters at work, and have for 15 years. I think I've cut myself...maybe twice, both very minor to the point where I only put on a band-aid so I couldn't accidentally get blood on merchandise.
I use this type, pretty much exclusively:
However, this type is no longer available to us to order with company money.
Now, my co-workers cut themselves ALL THE TIME. I've had an employee cut the tip of his finger clean off with a "safe" box cutter, which I've found to be more likely to cause injury that the ones I use.
This is the motley crew we can get ahold of:
"The Lizard"
This is useless. The blades break off all the time, sending sharpened metal shards flying, and while they are fragile enough to break, they are still soft-enough to go dull within an hour's work. Also, because that safety hood is spring-loaded, people, rather than just pulling it back with their thumb to expose the blade, will instead plunge the cutter deeper into the box than they need to because the hood obscures the view of the blade's depth, and they end up damaging product.
"The Widdow Maker"
This one is, in my opinion, the most dangerous. It has an auto-retracting blade for "safety" but when people use it, they press very hard on that button/slider so that the blade stays out when they are pushing in to cut, that there's tons of unneeded exerted forces and it's easy to slip and lose control of it. This is the one that cut off the tip of the guy's finger. (I take it as a point of pride, because he was breaking down a structure I built out of cardboard and packing tape.
It's also heavy and gets hot in your pocket, which means that people don't keep it in their pockets while they work. Which means that they get left EVERYWHERE.
I actually hate them so much I spend my own money on box cutters and blades for them so I can use them.
I've also tried this style, but it's too expensive and it's flawed:
"The Terminator"
This is the relative newcommer to the game. While it's handy because it uses the bigger blades, but is smaller in size, and the blades can be changed without tools, that center hinge is a design flaw. I've had three different knives like this open up on me when that center screw pops out when it eventually unscrews. Add to that all the little extra metal bits everywhere, and it snags loose threads in your pocket liners.