Ball of fire that split into two, moved in and out at light speed, formed as one again and landed on the ground.

I was traveling with two other people in a semi coming back from San Francisco.  We had just crossed over into Arizona when I saw what I thought was a meteor heading towards the earth.  It started to get so close to the ground that we pulled the truck over to observe.  Other vehicles on I-10 also pulled over and watched this most amazing sight.  In a split second the object stopped dead in its tracks and hovered there making a whomm whomm whomm sound.  Then it split into two balls of like fire and started moving in and out of each other.  It looked like the sign for atomic energy!  After I have no idea how long, it formed toghether as one and landed on the ground.  I have no idea how much time passed before everyone that had stopped just got back into their vehicles and drove away.  This experience has had a profound impact on my life and opened my mind to other forms of intelligence.  It is something that I will never forget!