You did luck out. Most haven't even heard of a moonbow never mind seeing one. When I lived on Maui a couple of us went camping up into the high hills above Lahina. The weather that evening had been chilly & somewhere between a mist & a light drizzle & when it stopped, coming off a mountain not far from us & dropping & disappearing into a valley appeared a moonbow, no real colors just a white hazy bow glowing in the evening dark, beautiful. That was nearly a quater century ago & the image is still quite a vivid memory.   

My other unforgetable night sky vision was of the Northern Lights. About 35 yrs ago in New Hampshire a crazy old man came bursting into where I boarded screeming & babbling about lights. He finially got a group of us outside & we stood stunned gazzing up into a cone of rippled, pulsating, electrical, multi colored lights all generating from the base of the cone & driving up towards the peak.
   
Barry