UFO Leaves Burn Marks Outside Resident's Home

This event happenned two years ago.  My uncle did not want me to reveal this....

I recieved a rather intense phone call from my uncle. He happens to live in a rural area.  On the phone he stated that the night before, he was inside of his house, doing some home rennovations when suddenly this super bright light filled his house.

Initially he thought that someone in a car was shining their headlights into the house. Quickly, he ran outside to see what the heck was going on... it was coming from an object hovering outside his home  - then it just disappeared.  

The next day I went to his house.  He showed me where the object was. I noticed that there were four circles burned into grass. The circles were aranged in a diamond shape. The two large circles (18 inches in diameter) were opposite each other with a distance of six feet. The smaller circles (8 inches in diameter) were opposite each other on the other apexes of the triangle.

My uncle had said that this phenomena has occurred more than once.  And he begged me not to tell anyone.  Well, today I was cleaning out my closet when I found the pictures I took of the burn marks.