[ though he hesitates at first, he begins to follow after once he realizes Arles is waiting for him. ]

None that I can think of, unfortunately... It's a trite saying, but "expect the unexpected" is the best advice I can give. And, perhaps, learn the layout of the city as well as you can, in the case that you're unable to return home.

[ or there's another city-wide blackout. you know, whichever. ]