wierd experience at chiropractor

I recently went to my chiropractor complaining of pain above my tailbone.
He told me that my pelvic bone was out.
He popped it back in, and then had me turn over on my back.
He then proceeded to take the big vibrator thing that he usually uses on my back before he pops me back in, and started rubbing on my sensoredl area and told me he was doing this to relax the muscles.
The whole thing was incredibly uncomfortable and just wierd.
I am just wondering if this is typical or not. Because it just didn’t seem right. Your help would be greatly appreciated, I just didn’t know what to do.
Thanks