Once I was watching the Sex Pistols' documentary 'the filth and the fury' and I fell asleep... and I had a very, very chaotic dream- imagine being among all those punks. I somehow enjoyed it and pretty much thought it was real (during the dream)- and a minute or two after I woke up and it was showing the last bit of the movie when Johnny Rotten said, 'ever had the feel of being cheated?'
It was weird.
And another time when I was watching Donnie Darko (for the nth time), again I fell asleep. And in my dreams, the big bunny rabbit actually said 'Wake up Derek, wake up' instead of 'Wake up Donnie, wake up'... I was very confused when I woke up.
Joy of falling asleep during watching movies which you remember by heart.