I think emergency lights come on automatically, when I car gets into a catastrophic accident.
I had a Mini Cooper pass me in Oklahoma. A few minutes down the road, they were in the median. They ran into the wires that kept them from crossing into oncoming traffic.
The car was shredded. Fiberglass torn off and spread all over the Westbound lanes.
And the four-way flashers were on.
The woman in the driver's seat looked like she had no idea what just happened. I don't think she was in her right to turn the flashers on after what just happened.