[CuriousCosmic]

The problem is that l'appel du vide does not just apply to jumping off a cliff. It tends to pop up in situations where somebody could take a very simple yet extremely dangerous or guaranteed life-ending action. The other common case of l'appel du vide is the thought of just letting the car swerve into a tree or pole.

[anigbrowl]

I know, but I don't think that is the only factor in play. You could have vertigo without ever having the inclination to step in front of a train.