Driven by Gregg and carrying Joe and Jill, the truck gets its wheels stuck in heavy mud; with Jill's encouragement, Joe manages to push the truck free, and the police then get stuck in the same mud as the truck drives away.
The truck was driven by Gregg and carrying Joe and Jill. The truck gets its wheels. These wheels are stuck in heavy mud. Joe manages to push the truck free. This is with Jill's encouragement. The police then get stuck in the same mud as the truck drives away. This is with Jill's encouragement.