Near the fire truck ladder with 2 finishers saved, press LB and your man will chase your opponent up the the bucket lift and push him to the floor.

At the back end of the limo you may grapple your opponent and drag him to the end door, this will allow you to slam his leg in the door much like the ring hot spots.

Also most of the vehicle attacks have 2 moves. When you throw the opponent to them you may just grapple them or do a strong grapple, holding RB to perform the alternate move
Example: on the herse the two moves are slamming him to the herse, then the boogeyman appears. The other you'll throw the opponent to the herse and punch him in the face against the herse.