A notice suddenly appeared on the Gates of Heaven: No Giants Admitted. Then INDRA proclaimed all giants were to be banished to the Underworld.
DITI was not at all happy, and asked her husband KASYAPA to make her pregnant with a son strong enough to destroy INDRA. To shut her up, he agreed. But only on condition that the pregnancy would have to last 100 years, and she must remain pure in mind, body and spirit for the duration. Rules eh?
Much much later... the baby was due! Overcome with excitement DITI broke a rule and forgot to wash her feet before bedtime. Woe, disaster, red alert — the news was received by INDRA who sent an embryo-destroying thunderbolt.