Happened to me once... only I had to swim across the street... literally swim because the city I lived in had no storm drains. My mom conventionally forgot to pick me up on the day it was raining badly. When I got home, she was inside the house slipping out of the warm shower. I asked her why she didn't pick me up and she said she forgot. That's like forgetting you have a job or that you got paid that day. How can you forget to pick up your child when you do every other day except on the day it rains?