When a particularly egotistical character tries to pretend to be someone else, his massive ego shines through if he has to talk about his real self. A subtrope of Paper-Thin Disguise.
- On South Park, when Cartman disguised himself as Butters' personal robot, at one point Butters started telling him about all the crap Cartman had pulled on him in the past.
Cartman as AWESOME-O: Wow. Sounds like this Cartman kid is pretty smart.
Hello, Unknown Troper. You'll need to get known to lend a hand here.