Me and my wife were observing the half moon, when suddenly to the right of the moon and seemed to be around 25000 ft, she said to me, do you see that and i said yes, we saw a very very bright object moving at a very high speed, and 3 seconds later it vanished. i blew us away, i didn't have a light pulse like a plane, and i waited for that to occur again, but as i said it just vanished. i have never witnessed something like this. i observed the sky for another hour but saw nothing more.