You were fighting upper moon 4 with Tanjiro, Nezuko, and Genya while in the swordsmith village near the hot springs, but you got stabbed in the gut by one of the clones, Aizetsu the sad clone, but you were still in your demon form since you ate a part of Aizetsu's arm not while ago so you survived, you looked up at him

You: "Wana see a magic trick?"

Aizetsu: "Yeah."

You: "Good. ABRACADABRA!"

You suddenly pull out a gun and shoot his head off, the bullets where nichirin bullets