Just driving to work earlier with my liftshare guy in the passenger seat and from nowhere there was an almighty bang/twang sound with a ricochet inside the cabin. I think we both let out a little poo. It was like we'd been shot at but we were on a lane in the cotswolds so it wasn't likely. So I kept going as everything and seemed fine with the car and no one was bleeding. Got to work and started looking for whatever it was and noticed that the drivers seat near the transmission tunnel had this bit if quarter inch steel bar sticking up vertically out of it, surrounded by shattered plastic trim. Passenger side has one too but it sits horizontally and is held there by a nubbin of steel the equivalent of which has sheered off the drivers seat. Excuse the photo - it's off my phone. But you can see the shiny end of the steel bar. Any idea what's it for or what made it suddenly try to embed itself in my ass? And how can I fix it?