a UFO of i m crazy?

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this is an unusual phenomen i encountered yesterday while at a visit at my friends visit. after we all enjoyed with the treat the 3 of us came down and chatted for a while in the garden next to the building....suddenly we saw huge light wandering in cirdular motion hovering over the building...the likts were extremely huge and pure white...we all were watching it like mad ...we didn;t knew neither we could explain it ... luckily i had a 3.5mpixel camere mobile through with i took a pic...here it is.. what should we do now? we consulted with other people but no one other then the 3 of us saw that light...how funny? or the 3 of us r crazy...what do u think? anyone witnessed anything similar?