I was leaving my grandmas birthday at the time. I walked out the front door of the house and saw a bright multicolored group of lights speeding toward me. I thought it must be an aircraft in trouble. I started screaming as the craft came into view seemingly instantly. It was shaped like a thin jar but was easily 50 ft tall. It hovered very closely to the ground and the grass seemed to be pulled toward it instead of being pushed away. The grass wasn't wavering though. All of a sudden a dull hum hit me and I couldn't breathe. Then at least 40 or so similar looking smaller craft burst into the scene where they seemed to be very oddly chasing the larger craft. The larger craft sucked the smaller crafts inside and then zipped off with a loud zoom or whoosh it kind of sound like a really loud dogs bark.