I used to have a tiger oscar by himself in my 120. He was always super excited when I walked by the tank because he knows Im the one who feeds him. One morning he was so excited he leaped out of the tank and hit me in the chest. He was ok after that.
i had an old 13 incher that used to sulk and float verticle with his lips on the surface and drift around in the current until i fed him then he was fine lol!