Extreme puzzle involves doing a jigsaw puzzle and running. I do the puzzle on my kitchen counter and, for every piece I place in the puzzle, I sprint up a nearby staircase. I have to hit both feet on the top of the stairs, it does not count. Typically, the sprint up the stairs occurs immediately after the piece has been placed in the puzzle. However, if I get on a roll, I allow myself to connect all of the pieces I can and then do however many sprints I owe in a row. For example, if I saw three pieces that I could immediately connect to the puzzle, I would place those three in the puzzle, and then I would do three sprints up the stairs in a row.