The customer service industry is unpredictable; customers range from super kind, to average, to complete wacko human beings. Servers often encounter a variety of strange, weird, odd, and unexpected situations, some of them being the tip that people leave when they are done with their meal. Apparently, not everyone leaves 15%, or any money at all… some customers prefer to leave some pretty strange, unconventional things instead. As we have worked in the service industry, we can vouch for the fac…