 so far in the first half of this nascar cup series race but most of the cars right at the bottom of the racetrack the tunnel turn is one of the most treacherous uh and sketchiest in all of nascar it is a corner that turns you two-thirds the other way it is the top of the pocono triangle as it were and as kyle just described with every passing race with every passing summer and winter with every passing freeze and fall the bumps become a little more pronounced and is the crew chief's task