That's usually his reaction when someone is trying to give him love. He'll be stone silent for about ten minutes, but if you keep at it for those ten minutes he'll usually react somehow. It could be bullbaiting, it could be the one-fingered salute, or just one snarky remark on your sexual orientation before he flaps his arms in the air and runs away. Either way, he can't ignore us forever. I think he likes the attention.