This is in the episode of Boy Meets World where there is a murderer in the high school. Cory, Shawn, Topanga, Angela, and Kenny are locked in the classroom. The scary janitor comes by and Shawn says"hey giggles, we're locked in. Do you have the key?" the janitor holds up a ring of keys and cory says"good. do you want to let us out?"obviously this means the door cannot be opened from the outside without a key. the janitor just walks away. A few minutes later, Eric and Jack open the door without a key. weird, huh?