The worst thing to ever happen to a cashier is when a customer farts before departing the register area.
Why? Because it lingers, it smells, and the next customer in line usually thinks it was me.
I always get strange looks from people when they think I farted. They know they can smell something, because I usually notice their noses wrinkle up, and then they'll look up at me to see if I am the guilty party. If they can't tell, they usually blame me anyways.
Why can't customers walk to the back of the store or even outside to pass gas? Why do they have to crop dust throughout the store so that the rest of us have to suffer?
Do you realize there is probably fart particles on most or all of our candy? That stuff is directly in the line of fire.
Think about that the next time you buy a Payday or Snickers. Think of who probably farted near it.