re: I would agree with you if
the area that you are jumping on is only the size of your feet and your weight would equal the total weight of the atmosphere over the state of California.
Hmmm…. The area of California is 410,000 Sq. Km. Air presses against the ground at average force of 1.0 Kg. per Sq. Centimeter.
1,000 Kg. per Sq. Meter
1,000,000 Kg. per Sq. Km.
Pressure (weight) times area = total of 410,000 * 1,000,000 = 410,000,000,000 kilograms concentrated to the area of your feet would make you sink into the ground I believe, so jumping might be out of the question.