With 14:28 left in the second quarter, the Chiefs faced a third and two from their own 44-yard line. Mahomes took the snap and scrambled to his right. It looked like he was set to run for a first down, which drew most of Denver's front seven towards him. So he slung the ball underhand and sidearmed to running back Jerick McKinnon a few yards away. There was no one near McKinnon and he cruised into the end zone.
Check this out:
Here's the replay from another angle:
That's just silly. He's so incredibly casual. It's an absolutely amazing play and phenomenal vision from Mahomes to get it done.