large craft hovering in field

in july 1993 i was leaving a friends house heading home, as i look in the sky in the distance i seen a strange light/craft, i got in my vehicle and turned on lights and started to flash towards the craft which iam quessing it was a mile away,and quessing a mile up in the sky, as i blink the light of my old vehicle the craft made two extreme movement that where so fast that no way we usa military cannt have anything like this, so as it made these move's it was over top of us...i called for the other people in the house and pointed up and all we could do is stand in aww as the traingle craft as big as a foot ball field hovered at tree top right over us with no sound and the craft was midnight black and light seemed to reflect of of it.the craft traingle in shape had small lights on ever tip of the traingle and one round light in the middle of the craft ,it held this postion for 10 mins and slow moved away to the north east at the same elevation,i proceeded to ! get in my vehicle and drive home it seemed to follow me and just disappeared out of sight,and to this day when i few of us get together we discuss it but i dare not explain to many people what happened they would think iam crazy...that was my experience i have another story from when i was a kid but that i quess may be for another time,just so you know i dont have any idea if this is connected but when i broke my arm as a teenager they found in my arm what looked to be a bb  in my right arm that showed up on x-rays and still there to this day.....
Witness elects to remain totally anonymous; provides no contact information.  Date in July 1993 is approximate.  PD