One of the big advantages of a little knife, especially one that can go on your keyring, is that it is never left behind. No matter what, it will always be there, like the little pocket pistol that doesn't require a special holster of mode of dress to conceal. And in a real emergency, most times it does not need to be big, just sharp.
I've told this before but some may not have read it before. In January of 1991, I was driving my daughter Jessica, to the Toyota dealer in Frederick Maryland to pick up a car for her to go off to college with. We were on Maryland RT 29 west, where it ends by going under and curving around to join up with Interstate 15. Just cruising along at the speed limit, right lane, when an old dark blue Datsun B210 flies by us at high speed. Now, theres a 25mph curve right ahead where 29 ends and does this very sharp left hand curve under the interstate, and a big sign with 25MPH. Cold winter morning, and some moisture had dripped down onto the road making some black ice. The old Datsun hits the brakes late for the tight curve, hits the black ice and spins out, hits the dry pavement on the other side and rolls three times and bounces off the guard rail and comes to a stop on it roof. We pull off the road and run up to help.
Even while approaching the wreck, black oily smoke is rising from the engine compartment and I hear a baby screaming. Crawl into the wreck and roll over on my back to look up at the baby carrier seat belted into the car. Push seatbelt release and baby carrier drops on my chest and I push it out to Jess and turn my attention to the woman driver who is screaming hysterically. By this time black greasy smokes filling the passenger compartment.
I reach up and push her seat belt release button, nada. I put both thumbs on it and push like hell. No way. With all of her weight hanging upside down on it, there was no way I could get her out. So I dig in my jeans pocket and come up with my old Buck stockman. This was sort of my pre knife nut days, and I'd been carrying that old 301 Buck for over 20 years. It was well worn but still good to go. I took out the sheep foot blade which was semi sharp, since I didn't want to drop a hysterical thrashing screaming female down where I had a pointy blade out. The sheep foot blade sawed through the seat belt webbing just fine, dropped the lady and I crawled backwards out of the car while gagging and choking on black greasy smoke. For the next few hours every time I blew my nose it came out black, then shades of gray.
So, I used a 1 3/4 inch blade on a slip joint pocket knife to save the insane driver from death by smoke inhalation. For 25 years that little Buck was a daily carry. Small enough that it was always in my pocket. Any small sharp knife would have done it, just by being there. Like my old man always told me, it doesn't have to be big, just sharp.