Specifically, I approached it, it started going up, I started going through, then instead of continuing up like it usually does it came down.
So I'm pretty pissed off. (Though probably not as much as plod after the hail stones.) The tops of the doors and the roof is scraped, and there are dents in the roof.

The security guard showed me the video, and the sequence of events as described above is clear. He said I should have waited for it to go up. I said I didn't do anything I haven't been doing for the last 6 years. I have to call the park manager tomorrow.
Any ideas where this is likely to go, or what I can expect, or how I should deal with them?
Ta.