High school pranks are the best, until your prank causes a panic that results in fire trucks and ambulances showing up at your school. That’s exactly what happened this morning at St. John’s College High School along Military Road in Northwest D.C., reports WAMU:

A “practical joke gone awry” at a D.C. area private school today is likely to land at least a few students in the principal’s office. What was thought to be chemical spill at St. John’s College High School this morning turned out to all be a false alarm, school officials say.

The scare involved nearly a dozen students complaining of eye irritation and triggered a large response from D.C. Fire and EMS crews. Seven students were evaluated and released to their parents.

Half a dozen emergency units responded to the Catholic preparatory school on Military Road in Northwest D.C. after school officials alerted them to a possible hazmat spill. No students were transported to the hospital, and crews sealed off and then ventilated the affected classroom, a computer lab.

Maybe these kids should be forced to volunteer with D.C. Fire/EMS on the midnight shift for a week?