Just tripping a bit messed up my SI joint pretty bad a few years back. It didn't even seem serious at the time, just a bit of a stumble off of the curb, but the next day I could barely get out of bed and was in pretty serious pain for several days. Couldn't go up stairs and had a tough time getting my pants on. Still acts up sometimes.

So can a chiropractor!

I think that's the joke?