What is Juan Pierre doing to Andre Ethier?

Matt Kemp singled home Orlando Hudson for a walk off win. Celebration ensued.... and Juan Pierre saw this as his chance to mount Andre Ethier. I know Andre is a good looking guy and all, but couldn't it have waited till after the camera's were off, or at least talk to him about it first?

here is a link to the video: http://losangeles.dodgers.mlb.com/media/video.jsp?content_id=5084667&c_id=la where it appears as though Juan really is thrusting and "jousting" Andre. And the look on Andre's face! Head down, fists clenched, it really was a "brokeback moutain" moment.