Since you can't make noise by dropping things on the ground outside, a good strategy is to run over to the front door and throw the playhouse key at it.
When Granny comes downstairs, she will go past you and all the way down.
While she is unlocking the door, jump through the window so that she does not see you. Timed Window Jump: Make noise in the Backyard, then wait for Granny to come.It is better to do the Secret Area Trick which is described below.However, these things don't happen very often so it would waste a lot of time and would not be for those wanting to make quick progress. The only way that one can escape hiding from the Hidden Closet safely is if Granny wanders down to the Middle Floor enabling them to sneak back upstairs without her seeing and being able to avoid the Creaking Floors if they go through Bedroom 2 or if they hear her go outside in which they can do the same but should go to the Attic to be safe.