The expression "Carlsson on the roof" originated from the children's story "Karlsson på taket" by Astrid Lindgren, in which a "Karlsson" character lived on the roof of an apartment building. The name was given to Carlsson as a result of his habit of occasionally rolling a rally car onto its roof. In the Safari Rally, he even rolled the car intentionally, to escape from a mud pool. When journalists later doubted his story, he proved it by rolling the car again. The Ford factory team then tried the same stunt with their Ford Cortina, causing more damage to the car than had occurred during the entire rally.