What did a Calgary, Alberta witness testify to the Alberta UFO Study group of having witnessed at 11 pm on 8 April 2013?

I was just getting ready for bed. Behind my house on Margate Close there is a giant school field. I went to close my blinds when I saw a big dark ball move from about 20 feet up and land in the school field. I then noticed silver and red lights, almost like christmas lights flashing.  I heard a wierd rustling noise and kind of like a high pitched squeal that lasted no more than 5 seconds.

The lights continued to repeat and then all ofa sudden the object shot up and disapeared. I was terrified and went to spend the night at my sisters.