[Smokin' Joe]

Actually, a friend died, trapped in his seat belt in an inverted vehicle for hours. He was a large and physically powerful man by any standard, and I wondered why he couldn't get out...

Hang 320 lbs in a seat belt. The contact area of the latch is between 1/3 and 1/4 of a square inch in surface area, which means the force to overcome between the contact elements is the weight multiplied by a factor of three or four, depending on that surface area--in his case, well over 1000 psi. between the contact elements of the latch...

I carry several knives distributed on my person routinely as tools and also for such a possibility, but I also have a pickup with a seat belt latch which is difficult to open under ordinary circumstances.

That is on the ground, but in an inverted piece of aircraft cabin, the same problems would apply as hanging in the belt in an inverted vehicle.

[Osage Orange]

I have a tool...that I have in my car.

Busts windows out...and cuts seat belts.

I hear you....