Many fans would like to believe that Han Solo (Harrison Ford), needing to be redeemed at the start of Star Wars: A New Hope, would easily have pulled the trigger on an imminent threat.
Except, even George Lucas has taken the side of saying Greedo fired on Han initially, causing Solo to fire back.
Han First Shot, of course, is a reference to the “Han shot first” controversy that has raged in the Star Wars community for decades, debating whether or not the rogue scoundrel blasted Greedo in self-defense, or in cold blood.