my brain actively throws all sorts of lines at me about this   what if you locked it wrong   what if it unlocked right after you locked it    what if you unlocked it after locking it and didnt notice   what if you only think you locked it but never actually did  what if in the process of removing the key from the lock you accidentally unlocked it   what if the key is messed up and is turning without locking   what if a ghost unlocked it after you walked away   what if a magic illusion was projected that tricked you into thinking you locked the door   what if you instantly transferred into an alternate realitytrading places with your alternate version and they had not yet gotten around to locking it    i wish i could say i was joking but all of those occur to me regularly whenever dealing with locking my door the last one in particular is nearly constant and all are very insistent it often takes me several minutes to get my door locked and even from the inside i have to check it repeatedly and often