Public Speakers

One thing about some public speakers that grinds my gears is when they get all emotional while telling you a story and when they're done they're magically not emotional anymore.  I'm sure you've all encountered this type of public speaker.  Don't they know it starts to get annoying when they keep doing that?  It makes their stories less emotional 'cause the whole time I'm thinking stuff like, "This isn't that emotional, why would they cry about that?" OR "He's full of it," and I start to anticipate that moment they switch their emotions back.  Don't get emotional just to captivate the audience & then switch back to speaking to me like normal.  It's annoying.