For the longest time, Dr. Kelso and Dr. Cox were archenemies on "Scrubs." Kelso was the Chief of Medicine who ruled Sacred Heart Hospital with an iron fist, while Cox was the best doctor at the hospital who was always standing up to Kelso and his tyrannical ways. Since Cox was the only person at the hospital unafraid of him, Kelso generally tried to avoid any confrontations with Dr. Cox.
The most hilarious instance of this occurred in "My Jiggly Ball" (Season 5, Episode 4). Dr. Cox wants to get a hold of Kelso so they can talk about one of his drug trial patients. At first, Kelso manages to avoid Cox by quickly walking out of the hospital. When Cox chases after him, he sees Kelso has lined himself up against his own painting on the wall in an attempt to look like he is a part of the painting.
This leads to a hilarious exchange in which Kelso stubbornly keeps on pretending to be a painting while Cox stands in front of him, remarking "Bob, I can see you," "For god's sake, you're three dimensional," and finally "I'm physically touching your arm now." To cap it all off, Kelso then straightens up like nothing weird had just happened and greets Cox cordially.
