Yes, it is possible to get slapped in the face twice. Depending on the situation, this could happen in a variety of ways.
For example, if someone slaps you in the face once, and then you confront them and they slap you again, then you would have been slapped in the face twice. This could happen in a domestic violence situation, or if someone becomes violent after an argument.
Another example could be if someone slaps you in the face, and then someone else who witnessed the incident retaliates and slaps the person who slapped you. This could happen in a public place, such as a bar or a nightclub, where bystanders may become involved in a dispute.
It is also possible to get slapped in the face twice in a single incident. This can happen if someone slaps you in the face, and then you try to defend yourself and they slap you again. This could occur in a fight or altercation between two or more people.
In any case, getting slapped in the face is a traumatic experience and can cause physical and emotional pain. If you have been the victim of physical violence, it is important to seek help and support.