When you are escaping the Sol Vita and come down the stairs at the start, on the left hand side there is an explosion which brings down a staircase blocking your way through. However, first kill the men in front of you, then the man on the walkway above the wreckage. Then, instead of having to go through the package room, where you fight Harry for Hammond, go up to the wreckage. There will be a part where the floorway meets the hand rails. If you roll in the correct location, Carter will roll straight through the wreckage, avoiding the package room area and saving time and health.