We all have that one coworker we can't get along with for the life of us. If you were given a chance to get back at them, would you take it? One person working at a microbiology lab got really petty when she learned that her coworker was quitting, and made sure to be the one organizing the goodbye gifts. She remembered everything that this coworker had ever said about products they did not like and got every single one of them. Why? Well, the coworker in question was doing very… questionable th…