What's your favorite funny SPN episode?

In the comments of my TV Guide watercooler post about Hollywood Babylon, several folks commented that they either liked HB, Tall Tales or Hell House as their favorite funny episode of Supernatural.[Poll #972321]

Update on guest star for SPN episode 20

( Looks like there's been a change of plans )

Looking for an SPN screencap

Can anyone point me in the direction of a high quality screencap from Nightmare, the scene where Dean is helping Sam back to the car after his vision, their backs are to the camera and they have their arms around each other's shoulders?  I'm itching to make a new icon. :-)

Thanks!