I too will not forget the first moose I saw. Was walking a creek near Big Sky, Montana and the creek was lined with cat tails so you couldn't see the water. Lots of trees too. I stopped to wait for my dad and turned around and there was a break in the foliage and a huge-[censored] bull moose eating water plants less than 20 yards from me. Enormous animal. He sized me up for a couple of seconds, judged me no threat and continued eating. Scary.
Also had one come out of the woods at Steamboat and run right down the middle of a crowded ski run. It was a juvenile, but it was scared and in full throttle. People were diving out of its way all over the place.