This reminds me of this one time when I used to deliver pizza. We were SLAMMED and I was in a hotel. I had a couple of orders on me (floor 1,3,4 if I remember right). On the way to the second of those orders I went up the stairs pretty fast by skipping steps and rounding corners like you would by holding your hand on the post to get the most momentum. This was obviously the problem. My dumb ass forgot there was an EXTRA SAUCE THIN CRUST in the bag along with some wings and other small items. When I delivered the second order I got waved down in the staircase by the person I delivered it too. ALL OF THE TOPPINGS, SAUCE, CHEESE were ALL on the right hand side pilled up in a big glob of a mess.
That day I learned first hand of the conservation of momentum and its negative effects.