Multiple (5+?) Unidentified aerial phenomenon in Bellevue, WA.My friend and I were at the the park. It was nearing dusk. Sun setting at approximately 20 degrees to the horizon. I notice a white light orb fly from left to right into a long thin cloud (the cloud almost looked like a contrail). I expected it to fly out the other side of the cloud as an airplane would. But it did not but in fact remained hidden in the cloud for a moment, then exited, but from the opposite direction! It flew left and out of view for a moment then came back to the right and flew a little higher and was just then hovering above the cloud. My friend and I and I began taking pictures and video with our phones and we noticed the object is pulsating almost like a giant strobe light in the sky, but a slightly irregular pattern. A moment later three other white orbs of light appear and are hovering there in place (So there are now four orbs that are just hovering in place above this odd looking cloud) and one of the newly arrived orbs (the one furthest right and lowest in the sky) just all of a sudden lets out a huge flash of light and then those three just disappear as quickly as they came, leaving the original one remaining. It then slowly flew to the left and out of view again. This was the end of the sighting which whole thing lasted about ten minutes (I have the last 5 minutes on video). When I did check the video I was amazed to find that only the first white orb was captured by the phone camera (and only for a few moments otherwise it is apparently cloaked from video recording but not the human eye). I was also very surprised to discover, on the video footage, much larger grey objects, moving at impossible speeds, that are shape shifting as they zoom across the view. I had to play the video back frame by frame just to do a screen capture and there is at least one, I would say school bus sized grey craft that seems to have two large lights on the back and maybe a light aura around it. This object was completely invisible to my friend and I as we were witnessing the white orbs. I would be interested in having a scientist examine my video to tell me approximately how fast this craft is flying. Also none of the objects made any sound whatsoever…((NUFORC Note: Witness provides no contact information, so we are unable to provide him with the information he requests. PD))