If the VW van tipped over on its side where the sliding door was, they still had the open sunroof on the top of the van that they were shooting out of that they could have climbed out of, after it tipped. So there is no valid explanation for them being trapped inside.

I'm not buying it. When the minivan crashed into the photo booth metal pieces of the booth must have impaled or injured the Libyans. Or the crash just caused enough damage to incapacitate them until police arrived.

What would make more sense would be for Doc to have called the police and tell them to be there at the mall right at the moment after they crashed, since he knows when it is happening.