Go to a parking deck. Sprint the stairs to the roof
Walk the stairs back down.
Walk the stairs back up, taking two at a time.
Run the parking ramps back down to the main floor
Rest 3-5 minutes
Run the ramps, hard, back up the the roof
Go down the stairs, taking two at a time
Sprint the stairs back up
Walk the stairs down
Walk the stairs back up, taking two at a time
Slow jog down the ramps back to the main floor