No early alert before slamming on the brakes, only tapping a rear bumper on a 1999 Toyota Tundra. No damage to the Toyota but to my surprise, the insurance company said the Tesla's totaled. The airbags for the driver were deployed only, with no other passengers in the car. Quite a loud noise. I have an EDR report, not sure how to interpret it. Did not hear any warning lamps. Fortunately, both the other driver and I suffered no injuries. I would like to find out exactly what happened.