Like a real-life version of a Looney Tunes cartoon, a visitor to a Portuguese museum was injured last week when he stepped into an art installation resembling an inky void. Currently on exhibit at the Serralves Museum in Porto, Descent Into Limbo by Anish Kapoor includes an actual eight-foot hole that’s painted black—so it appears to have no depth at all. According to Britain’s Times, attendees of previous showings of the work have questioned “whether there really was a hole in the floor or whether it was simply a circle painted with an extremely dark black paint.” Presumably there will...