I was walking back from the store and was looking down the hill when it caught my eye. At first i thought it may be a balloon or some such.It had a semi triangle shape with another half circle shape behind it. The shapes moved at different speeds but the half circle one stayed behind it. It moved faster than the clouds around it. I was pretty freaked out and amazed so I kept watching it until it went behind the clouds. I tried to find it again by waiting for it to come out the other side of the cloud cover but it did not. it just disappeared! I have never seen anything like it before and have not seen it since. Now every night i look to the sky, hoping....... (sigh)