Everything that Pierre-Renard is saying here is true! At least according to Wikipedia, as well as an old Paris tourist guide, where I got the idea from for this story element in the first place!
D'oh, why didn't I think of that!?
Ironically though, at a later point in this chapter we will see someone else wearing exactly that, a headphone with a mic...
Ironically though, at a later point in this chapter we will see someone else wearing exactly that, a headphone with a mic...