At the start of the game in the Classroom, select the Foot and use it on the top-left and top-right corners of the door and chalkboard respectively. This will trigger an animation where Beavis and Butt-Head walk to the chalkboard, and Butt-Head draws a picture of Hatman before cutting to the game's ending cutscene.

Hatman's existence in Beavis and Butt-Head in Virtual Stupidity was first revealed in a 1999 Chicago Tribune article on Hatman after Viacom New Media was integrated into Virgin Interactive in 1998, although it would take another 20 years for video footage showing this Easter egg in action to surface online.