I was able to deploy my folding knife clipped to my front cargo pocket without any difficulty.
I actually mentioned front pockets and the belt on purpose. Cargo pockets seems to stay pretty accessible. (having bulky items in cargo pocket can cause other issues during a side impact) Do not forget gravity, when being upside down. Instinct can be a issue when you are upside down.
[A simpler tool such as a large screwdriver, fixed blade knife etc. can come in handy in that kind of situation if no better alternative is at hand. Not necessarily the most professional or efficient way to do it, but it just might work. I have (ab)used the Glock knife for a similar application with some success in a couple of occasions - thankfully never in a real life or death situation. I even used an entreching tool once to pry open a jammed door. It wasn't pretty but it did the trick luckily. The Gerber LMF II has been quite popular in some branches of the military lately for the same purpose. I'm sure a proper crowbar or rescue tool would work much better still if you can get hold of one in time.
Note, that since the middle of the 90´s safety has jumped up significantly. The passenger compartments are made much much stronger. Intrusion inside the passenger compartment has significantly been reduced. Car doors are far less likely to get stuck, due to the frame around it being bend far less. (sometimes it not actually stuck, just locked. But some car manufacture also auto unlock feature when the airbags deploy)
The introduction of every stronger steels, mean certain thing won’t bent. Which is good during a crash and something to consider when a car needs to be cut by fire and rescue. Since steel doesn’t bent as easily, relief cuts are more important. Pushing parts apart may not require stabilisation on the pushed parts, due to the strength. Also cutting tools have become much more powerful to deal with these stronger steels.
Most modern fire departments also have a data terminal on their vehicles, so they can look up the properties of cars. Airbags, seatbelt tensioners, high voltage cabling (electric and hybrids), battery locations, type of steels used in certain parts need to be taken in to account before they can start cutting.
This also mean that simple tools in the past, no longer work properly or at all. With increased safety in cars, you will also need to specialise the rescue tools required for them.
For consumers current new things to consider are:
- A lot more laminated glass is currently used on new vehicles on side windows and panoramic roofs. This makes windows punches pretty useless.
- Due to the high amount of airbags; make sure nothing is between them and you. Having front, side, window and knee airbags really limits the amount the locations you can store things, including locations where rescue tools can be mounted.