Most people don't expect poop to fall from the sky when celebrating their birthday.

Everybody except this Pennsylvania family, who had to deal with an uninvited party crasher disguised as poo falling from the sky.

According to the video, the family was celebrating their daughter's sweet sixteen birthday and had just got done eating cake (thankfully, right?) when suddenly the canopy that the dad had just bought for this occasion was hit by something.

Imagine that family's surprise when they found out it was poo.

How? The popular answer is that it came from an airplane. The news story says that it is illegal for airplanes to "dump" off the stuff mid-flight and must do it after they land.

So while the birthday party came to a messy end, that girl who celebrated her birthday will have a great story for the rest of her life.

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