In the vein of Yoshihiro Hattori‘s shooting death in 1992 when he didn’t understand the word “freeze” comes this, from the Trib:

A 60-year-old Japanese passenger on a flight leaving O’Hare International Airport caused a bomb scare late Sunday afternoon when a passenger saw him write the words “suicide bomb” on a piece of paper… the Japanese national, who was on the plane on business, was only writing words he didn’t understand so he could look them up later with a dictionary, O’Hare police Sgt. Philip Deerig said.