This is a phrase used in a situation where people need to calm down. In this particular phrase , beans represents the harsh feelings or the feelings of anger. Putting the beans in the pantry represents the harsh feelings being put aside until they can be further resolved.
When three or more beaners attempt to clear a large obstacle by means of human propulsion. Usually two or more beaners act as the base, and then the 'hopper' loads himself into the hands/arms of the other beaners, and is catapulted over said obstacle.
I once saw a beaner fly, but I realized it was just a beanerpult being used to get him on the roof of my neighbor's house to steal shingles.