Joey Gallo couldn't get up in time so he just threw Andrelton Simmons out from his backside
With Simmons well on his way to first base, there was no time to get to his feet. So, Gallo did the only thing he could: He threw Simmons out from his rear end.
He's just a few days removed from waging war on the right-field concourse, so you really can't be surprised by the arm strength.