I suspect many of you, as a child, read a book called Jonathan Livingston Seagull, about a bird who wanted to learn everything he could about perfect flight and speed.
There's a line in that book that stuck with me: "Perfect speed, my son, is being there."
And that's what popped into my head when I read that Jarvis Jones ran a 4.9 40 at pro day.
I never thought Jarvis was fast, because I have eyes. But he is always at the ball, and I can't explain it, nor do I care to.
He doesn't have a start speed. There's no top speed. He is like water flowing well before the snap, through the path of least resistance to the ball. He is simply there.