The narcissist always seeks new thrills and stimuli. 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.