Mahāvācakāla

A man who lived on the banks of the Mahāvālukagangā. For thirty years he meditated on the thirty two impurities of the body in the hope of becoming a sotāpanna. But at the end of that period he gave up his meditations, renouncing the Buddha's Doctrine as futile.

After death he was born as a crocodile in the river, and one day sixty carts laden with stone pillars started crossing the river at Kacchakatittha. The crocodile ate bulls, carts, and pillars. AA.i.367.