Bobcat uncredited
I just noticed this time around (seen this flick many times).
The wino/bum on the stairs when Chong first goes into the hotel to meet Red, who says "Ahhhh, errrrr, Ahhhh, Merry Christmas" is Bobcat Goldwaith.
He isn't credited anywhere, but I'm sure it is him. From his filmography, this would seem to be his first movie appearence.
Anyone else catch him?