Applebloom Sweetie Belle and Scootaloo searching a way to escape the hot summer weather. Appleboom came up with an idea to to cool down. They went toward the pig pen and Applebloom told them pigs wallow around in mud to cool down quickly.
So they all 3 jumped down in the nasty muck and wallowed them all covered.

Scootaloo: Blegh… Was your best way to cool down Applebloom?

Sweetie Belle: Ah don't complain Scootaloo. It was a genius idea of Applebloom!

Applebloom: Yea! I know it would work.