The context of the following conversation is Jan was riding the turnip truck to the park. Jan fell off the turnip truck.:
Jan says Hey, can you give me a ride to the park?.
The friend responds Sure, but brush those green leaves off yourself; what is that?.
Jan responds Oh, I was riding the turnip truck to the park..
The friend responds Why are you asking me for a ride then?.
Jan responds Because, I fell off the turnip truck..
The friend responds That sounds like the beginning of a joke..