Directions
This is a classic case of a “you had one job” moment, this moment when someone messes up the incredibly simple job he had! It takes special skills to ruin something this simple, so before you go on judging him, you should consider that perhaps this was made on purpose, as a joke.
The only requirement for this job, really, is knowing your directions – you can’t be really be under-qualified for this kind of job, but somehow, people always find a way to ruin the most simple tasks. Some people are left-handed like that (or should I say right-handed?)