Two "Millionaire" ones:
My own worst nightmare
Earlier this week, in my dream, I made it to the show, and was ready to play.  For some reason, they're only taping "Celebrity Scoop" shows, and I'm on deck, even though I qualified for the normal game.  Kicking and screaming, I'm led to the chair, and have to play:
$100: Easy enough, got it right.
$200: Had to ATA, went with the massive majority, right
$300: Had to PAF, he laughed at me and gave me the right answer with :01 to go.
$500: No clue, used 50:50, guessed correctly.
$1,000: Thought I knew it, guessed, but I was wrong.  D'oh.
Wacky Nonense Dream
The other one I had was back when Millionaire was in primetime.  I made it to the chair, but had a special "speed-up" money tree, looking something... like this. 
$500,000
$32,000
$16,000
$8,000
$4,000
$2,000
$1,000
$500
And wouldn't you know it, I woke up just before the $500k question was revealed.
(EDIT: My bad.  I was the last contestant of the two-week run, hence the speed-up money tree.  Time ran out just before the final question.  So they gave me the $32k, and told me to beat it.  Not bad.)