Answer:
Using logical reasoning, if they collided front to front the engines would have a chance of implosion. But unless they aren't the same type of vehicle, e.g. a honda civic hitting a honda civic, there wouldn't be as much damage as the same vehicles hitting each other. Unless the counterpart is taking in big trucks aswell, such as a semi hitting a bus, then there would be a mainstreet explosionary blast most likely. But either way both will be messed up BAD.
If by inside, you mean staying indoors, then this is false. The average hours of sleep that people should get is between 7-8 hours. That would be 7/24 * 100 = about 30%. People must at least stay inside to sleep.
I hope I was able to answer your question. Have a good day.
