ORIGINAL: Missileman

Whats the worst that can happen?
Your airplane crashes through the windshield of a passing vehicle causing a major accident where the vehicle burst into flames that spread igniting a massive wildfire destroying hundreds of houses and shorting signal wires to a nearby cruise missile control center which causes the launch of several multi warhead missiles, things happen too fast and a massive retaliatory strike is launch leading to a full exchange destroying all life on the planet except cockroaches.
I guess that is probably the worst that can happen.