When Courage combs Muriel out of the hair, she is not covered in the hair she used to be in. But she had not been shaved yet, so how could that be?
When they show the old man getting his hair grown, hair grows on his back. But he was wearing a purple robe, so the hair couldn't have grown on his back. The same goes for the rest of the subjects.
Goofs In "Forbidden Hat of Gold": 1) When Courage takes his head off, it's held by a plug. But in "Klub Katz," it was held by a screw. 2) Where is the closet? 3) A fireplace that usually isn't in they're house is there.
In "Bad Hair Day," after fighting the guards, Courage gets Muriel out of the hair. She was wearing a purple robe, but in the next shot she wears her typical clothes. Then back to her robe again. When Courage and Muriel return home, she is back to her typical clothes!
(After reading the sign)
Muriel: Sounds like people who love themselves and their money more than anything else aren't welcome here.
Eustace: Big deal.
Eustace: You're bluffing, ya stupid hippies!
Dr. Vindaloo: I love my submarine. It's so pretty.
Muriel: (Hugs Courage) Oh, Courage, you're a cream-wich, you are.
Eustace: Stupid hat!
What the sign reads:
Whomever steps inside this place
Must vanity and greed erase
For if you're vain, well that's no good
Signed all of us who wear a hood
P.S.: We warned you
The invisible rock seen in "Invisible Muriel" is also seen in the episode, "Forbidden Hat of Gold." Dr. Vindaloo is wearing it as a necklace.
Ma welcomes Courage with the phrase, "Good to see ya" in "Mother's Day" and in "Forbidden Hat of Gold."
Bad Hair Day: Spoof
The "Bad Hair Day" episode is a spoof of Michael Crichton's 1978 film, Coma.
Episode Title: Bad Hair Day
Bad Hair Day is also a title of one of Weird Al's album.