Step 1: Create spawnpoint.
Step 2: Create antispawnpoint. It must face the other way.
Step 3: You spawn in normal spawnpoint.
Step 4: Your clone spawns in antispawnpoint.
Step 5: Your AntiSelf copies your every move, but since he faces the other way, he'll do it all in opposition.
WARNING: Contact with AntiSelf may result in strong mutual explosion. It might also blind people around you cuz it's bright and blue and... yeah. Don't do it.
Options (Server Prefs):
[] AntiSelves (Boolean for if AntiSelves will exist)
[] Self-explosion (Boolean for if contact with AntSelves results in aforementioned explosion)
It would be fun to battle your AntiSelves, and funny, most of the time if you kill your AntiSelf he kills you, either that your bullets will collide midair and explode in midair LIKE A BAWS!