The Office: 10 Best Cameos You Won't Forget

Jeong plays a character called Bill in 'Email Surveillance' during season two, episode nine. Best known for his versatile acting throughout the world of film, Bill is a classmate in Michael's improv class who's frustration at Michael can be seen from the outset.

Michael plays the same character at every Improv class, involving a handgun, holding up the invisible weapon the other classmates at the session. You can't help but think the first time Michael performed this routine people probably laughed, but in a classic Michael Scott fashion he kept reusing the routine until it became just awkward.

The 'jump in' acting exercise sees Michael and Bill together after the teacher tells Michael 'no more guns'. At first Bill and the rest of the class are excited by the prospect of Michael not just shooting everyone in the scene, but he soon goes back to his classic handgun scene.

After class the group are seen going to a bar, when Michael asks Bill if he can join he tells him they aren't going as a group. This leads to Michael showing up to Jim's party uninvited.