PepsiCo released its Mountain Dew Pitch Black flavor last August with a "spooky" Halloween theme. Those advertising geniuses predicted a huge demand for a beverage that's "so good, it's scary" or some other such nonsense. All cheesy, intelligence-insulting marketing aside, the scariest thing about Mountain Dew Pitch Black has been its propensity to turn your poop bright green.

MDPB is a limited-time only beverage. Which means it will disappear from the shelves right after Halloween. So the next couple days will be your last chance to participate in The Great Mountain Dew Pitch Black Green Poop Experiment. If you haven't tried it yet, it's worth it to see what it does to your poop. (If you have tried it, you know how vile this stuff tastes, so I doubt you'll want to do it again.)

What's next from those geniuses at PepsiCo? Pepsi Holiday Spice -- "Pepsi-Cola with a spicy finish of ginger and cinnamon."

I doubt it'll make my shit change colors, but maybe it'll make my log smell like a cinnamon roll. Mmm.