I was working at the local middle school when this happened. I had the take trash out to the dumpster and I often like to look at the sky to watch the clouds. I noticed this craft, very silver and metallic looking,no noise, almost like an oval cigar shape, and it was doing these impossible maneuvers. It would turn sharply and change its trajectory. Normal planes and helicopters would never be able to preform these moves. That is what caught my attention. The craft kept doing these amazing twists and turns for about 5 mins. It eventually disappeared into the clouds without making a noise. Never saw it again after that.