i was riding my bicycle on Clifton ave in Brockton,Ma. As i turned on to Green pl. i noticed at my 2 o'clock a small glowing ball in the air about 100ft of the ground and a couple hundred yds away. First thought drone, because of slightly unstable flight... As i was getting closer i could see it was a orange orb, the orb continued its path, and it was still what looked like wavering. I could see that i was going to be right under this orb on Irvington st.. So i waited under a tree, for the orb to come over the tree and into a clear area, no trees. As soon as the orb was directly above me, and i was consciously aware of what i was seeing..the orb reacted.. It vibrated(shimmered)and dropped 4 small balls or particles, they fell about 1 foot below orb, leaving trails and disappeared.. What also could have happened is that the orb vibrated and rose 1 foot appearing to drop particles... The orb then had a straight controlled exit out of area,, leaving at a constantly increasing speed until it was out of sight in the S.E.... i was very excited and interested in what i was seeing.. i knew i had seen something special, something i will never forget..