Every time I get leftover time in the SIM and I ask to try a dead stick landing I get turned down. Except once. Mid North Sea, 20,000ft. Both engines chopped, emergency descent to 10,000ft then a glide to AMS. APU failed to start as well. So clean +20 and I needed to circle AMS twice to get the height off. So many runways to choose so not really the best placement to try it but surprising how well the 737-800 glides clean. And what a difference it is with flaps out!! got down OK but lots to ponder over.