*flashback*
Estelle Morgan had study hall while Jack Gilinsky was supposed to be in choir with Jack Johnson.
Gilinsky ended up pulling Estelle into a staircase that nobody ever went up because it was the steepest staircase in school.
Estelle didn't want to skip class but Gilinsky wouldn't let Estelle leave so they stayed in the staircase the whole period.
When they went home later in the day Jack's mom was yelling at Jack for skipping choir. Estelle didn't get in trouble for skipping because Senior's were allowed to leave school or go to the library if they had study hall.
*flashback over*