- "Nobody -- calls me -- chicken."
While in 2015, Griff called Marty "chicken" (whom he believed to be Martin McFly, Jr.). This version came with chicken clucking sound effects added by fellow gang member Data while Griff extended his bat behind his back. Instead of walking out of Café 80's as he was supposed to, Marty stayed and challenged Griff to a fight. This resulted in a chase around Courthouse Square on hoverboards, and, ultimately, to Griff and his gang being arrested.Later that day, a 47-year-old Needles called Marty (also 47) "chicken" when he refused to get involved in a shady deal. The middle-aged Marty unwisely went along with the illegal plan, and was fired from his job at CusCo.
When facing Biff Tannen in 1955 for damaging his car, Marty started to walk away, having accomplished his mission of recovering Grays Sports Almanac. Biff called him "chicken", and Marty stopped. He was about to finish his sentence when he was hit in the face by the gymnasium door that his "other self" forced open. Biff took back the almanac, and Marty had to recover it again. Because he and Doc were delayed in 1955, the DeLorean was struck by a lightning bolt, sending Doc back to 1885.
On the day of the duel, Marty faced the reality of death, and realized, for the first time, that what other people said didn't matter as much as he had feared. Though he still had to confront Buford in order to save Doc's life, Marty withdrew his gunbelt rather than having a shootout. Marty was shot by Buford anyway; but Marty had cleverly protected himself by wearing an iron stove plate underneath his poncho, much as Clint Eastwood had in A Fistful of Dollars, which he then used as a weapon.
When Marty returned to 1985, Needles put him up to a drag challenge between their two pickups. Needles taunted Marty with the insult "chicken", but for the first time, Marty didn't overreact. Instead, he put the truck in reverse as Needles raced off, a decision that proved to be the correct choice. Marty watched as a Rolls-Royce came through a STOP sign and pulled out in front of where Marty's truck would have been. At that instant, the "YOU'RE FIRED!!!" text on the CusCo fax disappeared; regardless of what would happen to Marty in 2015, being fired from CusCo would not be one of the events.
After arriving at El Kid in 1931, Marty is accused of hitting on a woman named Eunice, by her boyfriend Ernest Philpott. Wanting to annoy Ernest, Marty pretends he has an interest in her, and calls him "chicken".Jackson's lackeys - when he refuses to swing over Dead Man's Swamp on a rope.
Behind the scenes
Marty's weakness was not evident in the first film. In his determination to reunite his parents in 1955, Marty didn't walk away from confrontations with Biff, though he did run away when the four member gang chased after him. In Part II, however, he was instructed to pose as Marty Jr. in 2015 just long enough to say that he was "out" of Griff's plans, and to walk away. When Griff used the insult "chicken", Marty's fear of being thought of as a coward caused him to depart from his plan. Marty's decision to run from Tannen gang members in various eras was a wise choice in each instance, but may have added to his insecurities about his courage.