My 9 year old son has been having muscle twitches that seem to be in his abdomen. They make his whole body do a liitle jump. It seems to only happen when he is sitting in fron of the tv - although that may be because that's the only time he sits still long enough for me to notice it. The stange thing about it is that he is completely unaware of it happening, and when I point it out to him, he's got no idea what i'm talking about. Is this something serious? We have a referal to a pediatric neurologist, but the appoinment isn't for 4 weeks, and it's making me nervous.