There are no blockers or play-action fakes to deal with when prospective NFL athletes compete at the scouting combine each February.
Tale of Combine Tape
Officials clocked Cook at 4.44 seconds in the 40-yard dash during the 2010 combine. Kaepernick ran the 40 in 4.53 seconds the following year, an outstanding time for a quarterback.
Kaepernick was already approaching full stride when Cook disengaged from the man blocking him (Brett Swain) to give chase after the 49ers' backup quarterback fooled the Vikings' defense with a designed run off play-action. That put Cook at a clear disadvantage even though he had perhaps a one-yard head start.
Still, with 70 yards remaining til the end zone, most cornerbacks would like their chances against most quarterbacks in that situation.
Kaepernick is not most quarterbacks, of course. He rushed for more than 4,000 yards at Nevada. He was one of four quarterbacks at the 2011 combine to break 4.6 seconds in the 40. Tyrod Taylor (4.51), Jake Locker (4.59) and Cam Newton (4.59) were the others.
Cook was close to catching Kaepernick near the goal line, but Kaepernick held him off with his arm and made one last cut to ensure safe travel to the end zone.
That is one fast quarterback.