MARINE CITY (CBS Detroit) A father is facing disorderly conduct charges for spraying something that smelled foul inside his son’s middle school.

Jason Festerman was called to school after his son was suspended for spraying prank item Liquid Ass in his classroom. Ads claim Liquid Ass is a “power–packed, super–concentrated liquid (that) begins to evaporate filling the air with a genuine, foul butt–crack smell with hints of dead animal and fresh poo.”

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Festerman claims he was innocently checking the item in the school, when it discharged — and the police were called.

Festerman was charged with disorderly conduct, which carries a possibly penalty of $200 and/or 90 days in jail. Marine City Schools officials claim he attacked teachers and administrators with the foul smell.

They believe he was acting out over his son’s one-day suspension. In a TV interview, Festerman said his whole family enjoys carrying out “Liquid Ass ” pranks wherever they go, though he said they punished their son for bringing their property to his class and disturbing the room.

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“We expect appropriate behavior from everyone who enters our building, we take action that we feel is necessary up to contacting police,” Principal Catherine Wolford said.

She added the smell was overwhelmingly strong — and reeked of rotten eggs.

What about Festerman’s assertion that he just accidentally sprayed the,  um, scent while testing to see if there was any left?

“Our security cameras seem to indicate otherwise,” Wolford said.

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Festerman hasn’t yet appeared in court on the charges.