It's the inertia of the "COMPRESSABLE" air within the vehicle. When turning to the right the inertia of the air within the vehicle makes it want to continue going straight until the left inside side of the vehicle forces it to turn right with the vehicle. Because air is compressable you sense an increase blowing on your right side as the air compresses toward the left side of the vehicle. The same thing happens when you have the A/C on.

__________________
A good pessimist is never dissapointed!