No, Ron,.... you are not normal. We will still ride with you anyway.😀
Not hitting anything, only when i peadal and let of then start hitting it, th crank is hitting nothing..Is your crank hitting something. That is a really loud bang, and it only happens when you are pedaling. Surely you should be able to visually detect what's happening.
sounds like a loose nut behind the wheel :rofl:.......seriously though, do you feel any side to side play in the wheel? That vid is not too sharp. Is the chain jumping on and off the smallest cog? If so it could be that you tweeked your hanger and the dérailleur is out of adjustment.
Are you smashing the frame with a hammer as you do this?
It sounds to me like the hub engaging. Every pedal stroke you're letting up on the pedal, then smashing down with it. If you keep consistent pressure on it, I would imagine you don't hear this. Give us a wider angle view of you making this happen. Where in the pedal stroke it happens, etc.