We have a cookie sheet like your tray. Sometimes it will jump and make some serious racket. Ron
No smoke smell after the bang. Had it back draft once, didn't let it burn hot enough before I closed it up. Things seem to working fine now. I will be getting the chimney swept a week from today. I would do it myself but I am concerned about losing my balance once I got on the roof.Does your house have a brief smell of smoke after the bang? If so your chimney needs cleaned. Happens at my house after I fill the stove. I’m not home much and my wife likes to fill the stove and choke it down. When I loaf it I let it burn hot for a bit and the excess smoke causes the creosote to let loose and fall, causing a quick backdraft.