While taking a walk near the lake with Robbie, a gust of wind blew Wendy's hat into the lake. She playfully pushed Robbie towards the water, sarcastically telling him to go get it. But Wendy pushed Robbie harder than she meant to, and he fell into the lake. He flailed around, and was forced to admit that he doesn't know how to swim. Wendy told their friends, and they have teased him about it ever since.