S1·E8 Willy With The Ants

The fly knows a wonderful vacation spot - in the middle of a horse's back. She just forgot to warn Willy and Maya about the horse's tail. One powerful swipe of the tail, and Willy falls unconscious to the ground. Of course, the ants clear him away: everything lying around is cleared away. With the ants, Willy comes to again, at the last moment - and from now on thinks he is an ant.