you're in a mountain valley, one engine fails but you can continue flight with remaining engine with insufficient power to crest the ridges and insufficient fuel to fly around the mountains
You just failed flight planning.
On a base check the Chief gave a flight to plan IMC between A and B, OAT, AUW etc etc. Had to tell him not possible as the LSALT was above the single engine capability in the stated atmospheric conditions and AUW. Easiest flight ever.
