In my opinion, I think it could be a symptom of depression. Once in awhile I get into hyper moods as well (where I am extremely happy) and then it eventually goes away and I'm 'normal'. I get the leg thing as well, but not sure if that is restless leg syndrome or what. But when I get that, I have to get up and walk around. Once I do that for 5 minutes or so...It goes away.