Benchmade is one of my favorite knife manufacturers. They make their products to withstand just about any kind of abuse, which is why they are so popular among military and law enforcement. They also make some nice gear for outdoors and rescue use.
Most outdoor adventures start in a vehicle, and the ERT-1 emergency rescue tool will provide you with some peace of mind when your vehicular approach involves only three points of contact. In the event of head-ass inversion the ERT-1 can help in three ways: first, punch the submersible LED light to get some visibility; second, flip out the liner-locking rescue hook to safely sever your seat belt; third, use the spring-loaded glass breaker to GTFO.
Obviously this is all applicable not only to your own situation but to any accident you might stumble upon. So be a hero and duct-tape the ERT-1 in its included holster to your Jesus-bar, so it’s at hand when you need it regardless of your head-ass posture.