Talking about how NFL have gotten rid of kick offs as they just kick it over their heads... and in league it's one of the most physical parts of the game where players are charging in full pace at each other... How Preston was never going to go low for a tackle on a kick off so there's always a risk of him making contact like he did and then he ricocheted into his own team mate, etc.
He had no solution, just that it might happen like it has in NFL... except I think the NFL have been trying to bring kick offs back as much as possible by changing rules... touchbacks giving up more yardage, moving kickers further back, etc.