In the wake of the arrest of Ahmed Mohamed in Irving, Texas, for carrying to school an electronics project believed by a teacher to look like a bomb, Make Magazine has a timely reminder that Ahmed's project is one of many home-brew efforts that sparked (or could have sparked) extreme reactions. Make's list includes a few from tinkerers -- and pranksters -- that not only looked like bombs, but were fully intended to look that way. ("Back in 1967, Apple co-founder Steve Wozniak was arrested for building a metronome and storing it in a friend’s locker. He rigged a tin-foil contract sensor to the metronome in the locker, and set up the device to tick faster when his buddy opened the locker.") The article doesn't note the 2007 incident in Boston in which a guerilla advertising campaign for "Aqua Teen Hunger Force" raised fears of a terrorism and led to two arrests. Gawker has a slightly more pointed article about other students who have specifically brought home-assembled clocks to school, without being arrested.