Two of my most laid back cichlids going at it for no reason!

Male herotilapia multispinosa and male geophagus "rio salito." Sorry for bad quality shots I just couldn't believe these 2 where fighting. The rainbow was just looking for trouble. Anybody ever have any random fights between peaceful fish? I used to sit back and watch my 5 clown loaches fight when I first got them. Now they've established their packing order and never fight anymore. It's kind of sad because it was hilarious watching them try to stab each other with the things on the sides of their faces. I can tell they don't fight anymore because they're not all scratched up anymore like they used to be after they attacked each other with their spikes.