It rubs me the wrong way, but I guess I don't have any major problem with it. To me, watching it is cocky, not celebratory. This is showboating. Running around the bases clapping/fist pumping, etc.. doesn't fall in the same category, IMO. Also, I feel like it was different for Billy. He had a look of "Holy crap, did I just do that again?" He looked shocked and momentarily stunned - once he woke up, he started running. Maybe I'm making it up, but they had different feels to me.