It flew over the crest at an amazing speed and disappeared in a small cloud it should have flown through at that speed.

It was about 9:30pm and some friends and I were hanging out. T ere is an area close to our houses where at the time there was some development going on.
This spot is nestled in the foothills. We were admiring the sillouette of the mountains against the dark blue sky.All of a sudden a tear shaped object flying pointed end forward skimmed barely over the crest of the mountain.The front portion of the craft was glowing in a blue/purple color while the rear of the craft pulsed in a peach color.It left a slight trail but made no sound.It flew directly across the sky and into a small cloud.The amazing thing was that the speed it was traveling at,it never came out of the other side of the cloud.We stood there shocked and amazed not breathing.Finally one of us broke the silence by yelling "WHAT IN THE HELL WAS THAT". We sat there and talked about it for two hours hoping we would see it again.Upon arriveing home(about two miles away)my little sister and my neighbors son were sittin in the yard.They described seeing the same object at the same time we saw it only they were directly under the cloud it flew into. They said it disappeared in a flash.
Date may be approximate.  PD