yea my tvs right next to my tank and one of my bichirs use to do this but now he watches the tv instead of freaking out when something flashes or i change the channel.....
Man what a trip. Sometimes I think my tsc is gonna do the same. He misfires alot and rams right into the tank wall !! Good thing my set up is half inch acrylic. My clown knife too. They both strike with such velocity.