I was flying an A-20 the other day and shut down both engines and couldn't restart either one.
I received a hit to the left engine oil (it was the left engine if my memory serves me right). I was loitering around a vbase and decided to shut the (shift+1 damaged) left engine down and save it for emergency power when needed. I shut the left engine off ok, but then I (believe to have) switched to the right engine (shift+2) and for some reason I hit the "E" key again and shut down the #2 (undamaged) engine. Now both engines were off and I tried everthing to get either engine back on. I performed an emergency landing and tried to restart both engines when parked, but no response in either engine.