At the risk of explaining what everyone here already gets: I like how the bottom picture could literally be a diagram of a 4-way deadlock where the buses are threads of execution and the roundabout exits are object locks.
Whereas in top picture there are no passengers and I’m fairly sure the buses aren’t moving. Which probably says something about the state of the documentation
For anyone considering watching: despite the name and this meme, not really a car movie. I enjoyed it (even if Clint singing over the closing credits is a bit much)