I saw an obstacle course that was horizontal, but made through the magic of TV, through the angle of the camera, to look vertical and very hard. They were crawling around the ground, as if they were soaring in the sky.
Then saw another obstacle course that was quite real, quite dangerous, and someone was making his or her way through it successfully, to honest cheers. I saw the “climber”: it was a white dolphin. I petted it for encouragement, although I was not supposed to.
In the end, the dolphin finished the course, and sprouted a leg.