Punch your myself really hard
Use a rubberband and snap it againts eye. If that doesn't work you could punch yourself
if you're a girl and you have over a DD chest size then run down the street, if your're a boy then headbut a lampost
Take a hammer and hit your eye with it
I believe Tyson Fury is a dab hand at this process,,,
Keep punching it
Color it with black.
How to give yourself a black eye & also how to give somebody else a black eye. Dont ask its a long story.