Hmmmm, it worked for me when I clicked on my post, but if you search “Belt Loop Bumpfire,” there are a lot of videos. Some are real goofballs, and a few want you to listen to them narrate for 20 minutes, but you can get the idea.
Yeah, I did look and found several. Never knew you could do that, seems a little hazardous and poor firearms handling but still can be done. Also found makeshift bum fires homemade from all types of parts.