A prank call, also known as a crank call, hoax call, phone call, phone scam or phony phone call is a form of practical joke committe over the telephone. As with all practical jokes, prank calls are generally done for humorous effect, though there is a thin line between humor and harassment. Prank phone calls began to gain an America-wide following over a period of many years, as they gradually became a staple of the obscure and amusing cassette tapes traded amongst musicians, sound engineers, and media traders beginning in the late 1970s. Among the most famous and earliest recorded prank calls are the Tube Bar prank calls tapes which centered around Louis "Red" Deutsch, and the Lucius Tate phone calls. Comedian Jerry Lewis was an incorrigible phone prankster, and recordings of his hijinks, dating from the 1960s and possibly earlier, still circulate throughout the country to this day.