Make a self-control roll at the end of any battle. If you fail, roll 3d, add the amount by which you failed your self-control roll, and look up the result on the Fright Check Table.
Make a self-control roll whenever you must keep silent about an uncomfortable truth (lying by omission). Roll at -5 if you actually have to tell a falsehood! If you fail, you blurt out the truth, or stumble so much that your lie is obvious.