I was driving with both back seats up and hit a large dip in the road and BAM the rear bench seat comes flying down hard. Luckily my dog was on the other side of the truck and it missed her. Only the larger side came down. She is 20lbs and if she had been sitting upright and that thing flew down on her she would have been hurt. I brought it to the dealer and they "tightened" the springs but not sure it fixed the issue. All dog owners be careful, there is no lock to keep the seats up.