The other day I parked my car, and came back a couple of hours later to see a massive oil puddle under my 1994 Corolla. This was the only time I had ever noticed that much of a leak, and I realized it was because my car was parked at roughly a 30-35 degree angle. Normally its parked on my driveway or at work which are relatively level surfaces, and I have never seen a drop of oil underneath those spots.
What could be the problem to cause my oil to leak only while parked on a steep incline?