The high school I went to had a bomb go off in the band room.
A mentaly disturbed tuba player (I kid you not) stole 4 sticks of dynamite from his grandfathers farm, wraped them in tape and shoved them down the bell of a tuba and lit them during Christmas break.
The tuba was in the last of four in line sound proofed practice rooms
It destroyed the tuba, took out 4 practice rooms (doors, walls and double pained glass) and blew the windows out of the main band room.
From the last window of the practice room there was a spray of tuba shrapnel on the opposite wall.
Even after the school rebuilt the band room we were still digging out tuba shrapnel from that wall for the rest of the year.
Someone taped 6 road flares and an alarm clock together and tossed it in the assistant principals office during school.
That was long before the city I lived in had a SWAT team.
That was a cluster-fuck indeed!
Both happened back in 1977.
Heck, at my jr. high school we had a 9th grader go over the edge. He took his dads .44 magnum and brought it to school.
He shot 4 people, one guy twice in the chest (both rounds went clean through him), one guy in the arm, one girl in the leg and he shot a guy getting away from him on a bike in the ass.
The city police were on the football field giving a self defense class to the girls, the two detectives got to this guy just as he was going to give the guy guy he shot on the bike one more to the head.
That was back in 1974, he is still in a mental ward for that.