Since they got a first down, there was no runoff. If it wasn’t a first down, it would have been game over. I mean, I guess that’s ‘good’ coaching and awareness, but the clock would have stopped, they could have got lined up really fast and spiked the ball and kicked the FG. They may even have spiked it fast enough to not get a review of the WR going out of bounds (so they lost the yardage which made the FG extra long). Or the refs would have blown it dead for review and stopped the clock anyway. So in reality, it was a really dumb move that didn’t do anything for the team.