Very scary one for me.
Two of my friends were causing the world to end/sink. They said it would be painful and slow and that the first signs would be for our legs to start aching. I was stood at a window, and the land around me turned to Lego.
Cut to next part, one of my legs had absolutely no skin, it was just bone, and it didn't have a foot on the end of it, so I was limping. Everyone was walking together, like thousands of people, and I was hobbling along slowly.
I then woke up, saving myself from falling out of bed, by putting one hand on the floor, and one hand on the side of my mattress. God knows what happened towards the end of the dream to make me do that, I can't remember the last time I fell out of bed!
It was horrible, and very graphic, so I didn't go back to sleep and have been awake since 4am.