I didnt wear it for trick or treating, i dont think, though my memeory is kinda hazy on that, so im not really sure.
Anyway, I made the costume myself for a haunted house thing my robotics club was doing back when i was in middle school. I got an old pair of sweatpants, cut a hole in the crotch area, then stuck my head through that and my arms through the pant legs. Then, I wrapped a few belts all around me, and hey presto, a homemade straightjacket! It actually looked better than an actual straightjacket costume, lol. And it was almost as effective, cause i could barely move my arms in the damn thing!
I finished it off with a psycho hockey mask my mom bought, which was the only part of the costume we spent money on, and a plastic hand hung around my neck with some jewelry that looked like a chain. My mom took a picture, but lord knows where that is by now.
For the haunted house, I would sit behind a corner, and jump out yelling STRIP THE FLESH!!! and the like (try and guess the reference, lol).
The whole thing was pretty fun, but damn if it didnt get hot in there after a while! And as i said before, the thing was surprisingly effective. I could only move one of my arms out of the belts.