My dad told me that often on his subway trip to work in NYC, he would see Mr. Magoo on the same train. He really meant Jim Bakkus, who did the voice of Mr. Magoo. But I always pictured the cartoon character sitting amongst real people on the train.
A childhood belief about cartoons

others believed things like this
- i used to believe that if you put a penny on a train tracks that it would derail it — ROSS
- For some reason, I used to believe that women only got raped on train tracks.
— Jessica Tinch - I thought cartoons were real, I remember asking my mom why there were lines around the "actors" in a cartoon.— Steven Graziano
- I thought the underground railroad was actually a subway.— Greg
- I used to believe that boys were like robots and had no real feelings, that they were not even real people.— Lisa
- Someone told me People and fish went to the same place.I thought they meant humans get flushed— MrK