1 .		One of the Gibson brothers at school accidentally left (his/their) locker unlocked.
2 .		Not too long afterward, one of his sisters noticed the locker was unlocked, and (she/they) opened the door so that the contents were in full view.
3 .		All of the students who walked by the locker took (his or her/their) time inspecting the contents.
4 .		Someone said (she/they) saw a poster of Buffy the Vampire Slayer on the inside of the door.
5 .		Anyone who makes the mistake of leaving (his or her/their locker) unlocked isn't likely to do it again.
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