Me and a friend during Math class:
Him: "Dude, how's Vintage Miku coming along?"
Me: "Meeeeeeh...that bitch is killing me with all her damn ribbons...I think I'll give up and just finish it without adding physics to the ribbons."
Him: "DUDE, SNAP OUT OF IT!! YOU'RE CAPOZEITOR23 (Yeah, he used my username)"
"Damn you, I give up already...*sulks*"
"AGFOAÑGFOÑ:ABHFG SHHHH DO YOU WANT EVERYONE TO KNOW THAT!? *covers his mouth*"
This actually happened...and reaction 2 happened 5 seconds later after I realized he used my username, then people asked who the fuck was Cap23 and I told them it was a superhero :3