Some senior pranks during high school are amusing but innocuous, like putting your Maryland high school up for sale on Zillow for the bargain price of $42,069.  Others, not so much.  Authorities brought charges against two Texas high school students who allegedly stunk up their school with a “fart spray,” resulting in class cancelations and some people seeking medical treatment.

According to NBC News, Diego Flores, 18, and an unnamed 17-year-old boy released something called “Hensgaukt Fart Spray” in Caney Creek High School at various times causing administrators to consider the possibility of a gas leak, so the building had to be evacuated and classes canceled.  Some students and staff exposed to the noxious smell became ill and were admitted to a local hospital.

Specialists in HVAC, chemical exposure, ventilation and sewer systems were brought in to find the source, but the smell could not be recreated without students in the building.  Ultimately, investigators identified the two students as the source. The pair each faced charges of charged possession of a prohibited weapon, a third-degree felony, for having a device to dispense the chemical, a claim Flores’s attorney says is “over-charging.”