I was in a completely white setting facing against some unseen opponent (I just somehow knew exactly where they were at all times). I had to jump on the head of this opponent like Mario jumps on goombas in Super Mario Brothers, could bounce repeatedly on opponents head; I remembered that Mario needed to ground pound on some enemies to defeat them. Each time before I jumped I had to pick up a shred of paper off the ground; the paper had a number which detailed how high the jump would be. Suddenly, the setting changed to include an expanse of water adjacent to the white background with a white ship pulling in. The unseen opponent jumped to the boat. I pick up a piece of paper that read "13". I jump, but not far enough to reach the boat. I remember that my cellphone is in my pocket and could get ruined if I fell in the water. I then wake up upon this realization before hitting the water.