The whole crew did pranks, it was just part of the fire station. The crew had rules with the pranks though, don't break anything, hurt anyone, or prank that can go south. Boden had in forced those rules, Kelly, Casey, Otis, Mouch, Stella, and Shay all followed the rules but there were three trainees that weren't apart if the team so they didn't think they had to follow the rules. One of the pranks they did had caused y/n to be in the hospital, y/n, not a firefighter, not an EMT, Boden's wife who makes dinner and cleans the firehouse. {Y/N didn't prank anyone, never liked to}