Whether im on the phone or talking to someone in general I have been known to either go blank or think about what im saying and then I start to stutter only abit but when that happens no words will come out of my mouth. It makes you feel really self conscious, I don't know of any fancy words and when explaining something I have to go round the houses cos im not smart enough to say it anyother way. People have been known to finish my sentences which is really embarrassing.