I went to George Park in Grand Island since it sounded like it had been fixed when I was at a different siren a while back. Ends up the coupler was put back on the standpipe and the blower frame is now bolted to the concrete pad it sits on. It's a pretty common thing around here. What happens is that they get hit with riding lawn mowers when the park people are mowing and it slides the blower over so the pipes don't line up and the coupler comes off.
Anyway, here's the video. http://youtu.be/-dGoycpcyag