User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-2062313-20121012102833/@comment-111.251.157.14-20121013151447

That flexing motion is a clear sign of "I'm manly, come and hit me." It works every time to attract those monsters attention in a wierd sort of way. Really helps when you have a few fellow hunters joining your hunt.