Fixed Seat Back...

and it was a piece of cake. Son is 15 yoa and 6' 2"-190. He is about as gentle as a proctologist who retired from the WWF/WWE. I could hear the lateral wires bouncing around in there. I pulled off the elastic strap...that took some time and removed the screws. Then you just grab the bottom of the seat back on the sides and pull it out and back. Then just slide down.

The hardest part is getting the elastic off the seat bottom wires.

Sounds like he locked his kid in the trunk.

You guys must not be aware of the problem with the seat back lateral support wires coming loose. Then you can hear the wires dangling around in there bouncing off the plastic seat back. My kids plops down in the seat and stretched some of the wires loose and I had to remove the back panel and reattach them. It's pretty commong with the Subaru seats. Even more common with big @$$ kids.