one (or two at most) words crash down on the right margin

This is a very, very serious trait.  If the sample has two or more instances of this, it is some stress the person is working through, nothing serious.  However, if this happens ONCE on one page with many sentences on it, the writer should be under the care of a mental hospital, because they are depressed, and are having trouble coping with it.

(+) suicide bombers
(-) most careers