A Pennsylvania girl’s Sweet 16 party was ruined Sunday when a torrent of human feces, dumped from a passing airplane, splattered all over the tables, chairs and decorations, got into the pool where people were swimming, and sent family members running for cover.

The only thing that didn’t end up with poop on it was the cake, which had fortunately been taken inside before the incident.

“We just got done with cake thank God, we took the cake back in, because within two minutes, something fell from the sky, it was brown, it was everywhere, it got on everything,” a guest at the Levittown, Pa., party told MyFoxPhilly.

About 40 people were affected by the literal shitstorm, but no one has determined exactly where it came from.

According to a family member who looked up flights on a smartphone app, there were 5 planes in the area at the time, any one of which could have bespoiled that sweetest of birthdays, the sixteenth, with its foul cargo.

The FAA is investigating.

[Photo: MyFoxPhilly]