Stay Away From The Smoking Hole In The Sidewalk

Just a tip:

Of all the urban phobias, fear of the sidewalk exploding beneath you seems like one of the most irrational.
True, it very rarely happens. But when it happens, it's awful. And when it happens with some frequency, as in Rio de Janeiro, the fear spreads -- there's even a word for it (kind of): manholia.
Londoners beware: the phenomenon has arrived in your neck of the woods. Check out this terrifying video of a man inspecting a hole in the sidewalk in Pimlico on Thursday morning.

Again, just a piece of advice: if you come across a giant smoking hole in the sidewalk, give it some room.