Then suddenly they all burst out laughing.  For Jumbo, getting tired perhaps of sitting up so much on his hind legs, tried to support himself against a stalk while he nibbled at the flowers.  But the stalk gave way, and Jumbo fell heavily across Pepper's neck, who, indignant at such a liberty, gave a squeak and darted away.  Jumbo, trying hard to look as though he had tumbled down on purpose, began to wash his face and ears in a very diligent manner.