21 mph, maybe just a hair under. It was almost exactly 1 second for him to get from the 30 yard line to the 20. But he was moving slightly laterally, moving from the right side of the 30 marker to the left side of the 20 marker.

But if he were moving in a straight (perpendicular ) line to the EZ, going 10 yards in one second would put him at 20.45 mph.

For reference, Marion hit 20.7 mph on his kick return against Utah. I suspect Kingston hit at least that.