What makes a Mexican jumping bean jump?
The Mexican jumping bean, the seed of a Mexican shrub, is famous for its quick jumping movements.
What causes them?
Butterflies of the species laspey resia saltitans deposit their eggs in the shrub's flower and after the eggs hatch, the caterpillars burrow into the young seeds of the shrub. Apparently, the seed jumps when the caterpillar grasps the web it has built inside the seed and jerks its body vigorously. This scares away birds and other animals that might attempt to eat the seeds. Jumping beans remain active for several months.
It is a well known trivial fact that Neil Armstrong was the first man to step onto the moon. However, many do not know that he stepped onto the moon with his left foot.
If you want to forget all your other troubles, wear too tight shoes. ~The Houghton Line, November 1965