Caption from LIFE. “Smoke Test, one of the harassments sit-ins have met ‘on the firing line,’ as students call demonstrations, is administered to Virginius Thornton. His tormentors are David Gunter, an N.A.A.C.P.-student adviser (left), Leroy Hill, high school teacher.” In other words: Thornton is having smoke blown in his face by his friends in order to practice keeping his cool and not reacting to provocation during his upcoming lunch-counter protest.