This was easy to spot and fortunately this area was not longer being used for anything but some wood storage- but this is an example of a foundation wall/retaining wall failure. This wall served the purpose of a foundation wall for an old apartment over a garage- but it is also a retaining wall due to the position of this wall. The wall lacked any weep holes or means for reliving water and the pressure of the water running down the hill (and other factors) literally pushed this wall inward but the good part is that this best reciprocating saw made the work.
Retaining walls hold a great deal of pressure from water and if they are not installed correctly- they will fail. 
