I was playing with Mario and this happened: To do this, you need to run against an obstacle, and turn to the other side right before hitting it. By doing this, you'll have something similar to the image. If you press left, he will not turn, but will keep pushing his back against the obstacle. The same thing happens if the obstacle is on the right side of the screen. I could do it several times, with several skins and in several levels. After this, you still can run to the other side/jump the obstacle and continue the level through. You need to run or it won't happen.
