I was staying over at a friend's place. There were four of us.
I drifted off to sleep while everyone was talking and watching TV.

In my dream, I was still at my friend's house.
The only difference was that there were nails sticking out of the walls everywhere.
And there was also someone I didn't recognize.
The person I didn't recognize told a joke, and everyone laughed.

I woke up to the sound of everyone laughing at something that happened on the TV.
So the laughing was not part of the dream. It was the noise that woke me up.

I wonder who that person was, and how they knew to tell a joke at that moment.