Direction out of destination after movement

We ran out of the building and then we were out of the building

Outside can replace out of when we refer to e.g. rooms, buildings- We were outside the building But outside and out of are not always interchangeable [> App 25.31]

Within, to mean 'inside', can occur in a few limited and formal contexts:

Everyone within the London area was affected by the bus strike Without, to mean 'outside', is now archaic.

8.9.7 'Get' + preposition/particle reflecting movement
Get, followed by a preposition or particle, often suggests 'movement
with difficulty' [compare > 12.13.1]:

We got into the house through the window (i.e. with difficulty) How did the cat get out (of the box)'? (i.e. it must have been difficult)

Time