Cubicle Rear View Mirror... and Metaphor for Life

Nobody likes coworkers or bosses who sneak up on them while they're working -- or even worse, while they're playing -- at their cubicle. Clearly the cubicle rear view mirror isn't the coolest of accessories, but what it lacks in fashionability it makes up for in practicality. Sadly, it may also function as a powerful metaphor for those who regret that their lives ended up surrounded by carpeted walls. Any readers out there have any noteworthy experiences with a cubicle rear view mirror?