You shouldn't skip ahead in line of someone.
Jane forgot to pack a lunch today and needs to get something to eat from her workplace's cafeteria.
Jane wants to finish up a presentation during lunch.
Jane anticipates a long checkout line, so she brings her laptop to the cafeteria and works on her presentation while she waits.
Jane starts a conversation with someone she knows to sneak into the front of the checkout line in order to get back to her office more quickly.
Jane's coworkers recognize her hard work and compliment her at the next meeting.
Two of Jane's coworkers see her cut in line and confront her in her office after lunch.