The narcissist is notorious for his low threshold of resistance to boredom. Most interactions in the workplace are part of the rut and thus constitute a reminder of this routine deflating the narcissist's grandiose fantasies. Narcissists do many unnecessary, wrong and even dangerous things in pursuit of the stabilization of their inflated self-image. Narcissists feel suffocated by intimacy, or by the constant reminders of the REAL, nitty-gritty world. Narcissists forever shift the blame, pass the buck, and engage in cognitive dissonance.
Narcissists are pathological liars.
You get the gist of it.