Flying over any kind of rough terrain at night certainly compromises your alternatives when and if something goes wrong. I felt reasonably safe at FL350 flying over our countryside with at least three engines turning and burning. Flying Army single engine helicopters on NVG at night in the mountains of Idaho was nerve wracking and we would joke...in case of an engine failure, begin the auto rotation and turn on the landing light at 100 ft AGL, if you liked what you saw keep 'em on, if not, turn off the light.

Cheers, Hans