What really gripes me is throwing short on 3rd and long (or running a draw play). Once in a blue moon, it works but generally it leads to a punt. In today's NFL, you have fairly decent chance of an illegal contact or PI call if it's not complete, so why not throw it past the sticks? And then to add insult to injury, after the five yard pass on 3rd and 15, the punt team will come out and take an intentional delay of game penalty to give Colquitt more room.
I'm thinking Mahomes won't settle for dump offs very often on 3rd and longs.