Whatdid Valli see on her way that made her laugh?

Vallisaw a young cow, whose tail was high in the air, running right infront of the bus in the middle of the road. The bus slowed and thedriver sounded his horn loudly. However, the more he honked, the morefrightened the cow became and it kept running faster and faster,right in front of the bus. Valli found it so amusing that she hadtears in her eyes. At last, the cow moved off the road.