Hunched over, cross legged, and arms stretched to the side.
Crossed legged, back straight, and arms hanging down.
Straight back, hands on your lap, and feet flat on the floor.
Straight back, feet flat on the floor, and arms hanging down.
Because it interferes with the cosmic energy.
Because it's just a good idea.
Because it frees your mind from being distracted.
None of the above.