In 1977, senior pranksters placed a Volkswagen on the roof of Herndon High School and brought a pig to school. The Volkswagen landed on the front page of that day’s Washington Star. (Courtesy of The Stinger – Herndon High School newspaper)

You’d think that after more than a dozen years in school, high school seniors would know what will get them into trouble and what won’t, but apparently some don’t.  It’s senior prank season, and while some have been innocuous, others have led to arrests and suspensions, with one school seeing nearly 20 percent of the senior class picked up by police.

Traditional senior pranks are harmless, and include activities such as making prank phony school announcements, putting desks and chairs outside, and putting alarm clocks in the ceiling to go off at different times.

But every year some kids take it too far.

At Teaneck High School in New Jersey, about 18 percent of the senior class got in big trouble after they entered the school after hours and turned over desks, urinated in the hallways, sprayed silly string and did various other things, according to

After police were alerted by a burglar alarm that went off inside the school, 63 students were arrested on charges of burglary and criminal mischief and suspended for several days.

At Harry Jacobs High School in Algonquin, Illinois, some seniors set up a slip and slide with water, baby oil and different kinds of soap on the floor of a hallway, which prompted school officials, who were afraid someone would get hurt, to order students to “shelter in place,” CBS Chicago reported. A few students may not be allowed to walk on the stage at graduation as a result of the prank.

In Caledonia, Ohio, a few River Valley High School seniors thought it would be a laugh riot if they cut down trees on the school campus as their prank. Twenty-five trees, to be exact, according to the Columbus Dispatch. Criminal charges may be filed. This was a far cry from 2013, when seniors at the school filled bathroom sinks with water and put in live goldfish to swim around.

And then there was a senior prank in San Francisco, where somebody posted phony inspection notices in the hallways that said that school district authorities required “mandatory penis inspections on all male students, faculty, and staff at Lowell High School,” according to the San Francisco Chronicle. A statement that the newspaper said was issued by the district reported that Lowell adminstrators are “regarding this incident as a senior prank, and the infractions will be addressed according to school and district policies.”

What district policy specifically addresses phony penis inspection notices is unclear, but there you have it. Senior pranks, 2014.