This improv game is in the following improv game categories:
exercise. Enter, as a character, through a door. Make the environment
clear (by means of the (kind of) door. In that environment, address your
character as a different character, then one of the characters (you again)
leaves (through the door, or through another door/window/hole/whatever).
Do this fairly fast and long enough so you run through your easy characters. You can shelve any interesting
characters you discover of course.
Excellent exercise to help you establish the Platform . This
is like a solo variation
on Ding Characters .