I'm trying to remember a children's book I read when I was about 10 (1990ish).
I thought it was called Holiday in Happy Land but I can't find it.
It was about a boy who enters a McDonalds contest to win a Disney type break by entering a slogan contest.
He gets hypnotised to think of a slogan and comes up with:
Hughey McGooey(?) is the funniest clown
Watch him drop his trousers down
With his ? so ? and his burgers so chewy
The funniest clown is Hughey McGooey
The boy wins the contest, but I seem to remember it has quite a dark ending, where apparently he has never actually come round from the hypnotism. Basically Total Recall for children.
Does this ring any bells?