In the 1995 film, Mortal Kombat, Johnny Cage leaves an autographed photo of himself following his fight with Scorpion.
The video game franchise added the friendship offering as an alternative to killing or "finishing" an opponent. Johnny Cage's friendship offering in the video game is an autographed photo of himself.
A Friendship is a finishing move introduced in Mortal Kombat II in response to the public controversy surrounding the Fatality in the original Mortal Kombat. Friendships allowed players to perform various (and highly unlikely) acts of kindness and goodwill towards their helpless opponent instead of killing them after winning the match.
Johnny Cage has a fight with Scorpion in the film. Johnny Cage clearly defeats Scorpion and kills him. After Scorpion dies, there is an autographed photo of Johnny Cage that appears.
Why was the friendship offering of Johnny Cage shown in the film if Johnny Cage killed Scorpion? There appears to be no other friendship offerings depicted in the film. Johnny Cage also defeats and kills Goro in the film, but there was no autographed photo shown after Goro is killed. What was the purpose of showing Johnny Cage's autographed photo after this particular fight with Scorpion?