Seems to confirm that "football speed" is real, which we kinda knew, and quantifiable.
https://www.nytimes.com/2018/01/04/sports/football/nfl-speed-leonard-fournette.html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=photo-spot-region®ion=top-news&WT.nav=top-news&_r=0