Can you go to heaven with your left foot on your right foot?

You can't go to heaven with your left foot on your right foot. This statement you see is very popular in novels, and it is often used in novels, which shows that other people's flying skills are very good, and they can fly in the sky and underground.

According to the real science, from your physical point of view, the force of the left foot stepping on the right foot and the right foot stepping on the left foot are mutual, so there is no upward force between them, which cancels each other out, so you can't move upward.