Stay safe, then call 911 for an official report. Document the scene with photos...

https://www.play-bookmarks.win/first-move-to-a-safe-spot-and-check-everyone-for-injuries-call-911

Stay safe, then call 911 for an official report. Document the scene with photos and get witness details. See a doctor right away, even if you feel fine. Avoid apologizing or signing insurance offers early