A short term exposure to stress can cause improved performance.
Instead of walking he could run or jog. If there is a longer way he took take that way
Low self-esteem is characterized by a lack of confidence and feeling badly about oneself. People with low self-esteem often feel unlovable, awkward, or incompetent. ... “As observers of our own behavior, thoughts, and feelings, we not only register these phenomena in consciousness but also pass judgement on them.