1. Contact a friend directly: If you know the contact information of a friend, you can contact him/her directly and ask about his/her situation.
2. Contact your friend's relatives or friends: If you don't know your friend's contact information, you can try to contact his/her relatives or other friends and ask about your friend.
3. Check the news reports: If a friend has a serious car accident, he may be reported by the media. You can try to search for relevant news reports on local news websites or social media.
4. Contact the local traffic police department: If you know the specific time and place of your friend's car accident, you can try to contact the local traffic police department and ask about the accident.
Please note that when asking others, you should respect their privacy and avoid infringing on their personal rights and interests.