Take last night for example. At first the dream was very fuzzy and I had no idea what was going on, but as it progressed it looked like one of those watergun arcade things where you hit the target for X amount of time and win a prize. Then it turned into a line going up a inclined wall and you had to race to get from the bottom to the top while staying in the line. If you went out of the line you incured a time penalty for each second out until you got back in. The final, and most interesting, change happened last; It was a championship-type contest and you had to do it with anything that peed (dogs, cats, you, whatever). ... Yeah, very ... interesting.
I didn't get involved in last nights dream until the last change, and then my team was barely staying in. I (using a dog the first time) was barely able to keep us in the competition and got us a second ahead of the other teams. The thing is, in order for someone to win or lose they have to be at least two seconds ahead or behind. After a couple of more rounds (you couldn't do consecutive rounds) we were ahead again by one second, and completely out. Go figure.
Of course, that's when I woke up and needed to go pee.