You'd better be careful of kids "watching the stop watch," trying to overrun and blowing out their knee.
Oh, and BTW. My prodigious offspring runs a 5.2 60 as a 15 y/o while dragging an obdurate mule behind him.
All of this, of course is a spoof on how apoplectic some people get over radar gunning pitchers and asking about average velocities at younger ages.