1.I was walking in park2.its unusual triangular shaped draw my attention3. At first I thought it was airoplane but its unusual light pattern and abrupt movement have hint that its unusual.4. When began to move fast,I wanted to still a clip but it was disappeared within. 30-50secs5. I immediately wanted to confirm its disappearence watching sky from different way towards same direction but couldn't find a trace of same object.6. There was lady talking on phone who also grabbed a look for 10secs