Anytime you get into a wreck, there is a risk for a fuel leak, and anytime there is a fuel leak, there is a risk for fire. First thing you should do when in a wreck, get everyone out of the cars if they are uninjured. If they are, and cant be moved, or are trapped, you should be looking for obvious signs of a fuel leak. If you witness a wreck, same thing. What are these fanatics going to do when they realize the new cars coming out with R1234yf have a semi-flammable gas in their a/c system? I heard about the fuel tank stink, which has been going on for better than 5 years if you paid attention. Notice I went and bought one anyways?