I definitely get startled more. Actually my friend and I were discussing this very topic yesterday..we were expecting a call on her cell and yet when it rang we jump about 3 feet in the air. I am assuming its got to be some kind of effect between the meds and our minds..
I get really jumpy when I am hypomanic, especially if I am a bit paranoid. It is like I am hyperalert and fear people attacking me...it is awful.