What was that midnight sound?

I live in Ivywild and at 12:10 a.m early in the morning of Monday, Aug. 26, my neighbors and I heard this loud noise that can only be described as the sound of a hot air balloon going over my house! This only lasted about 5 minutes! I couldn’t see a thing! My parents who live in Pikes Peak Park also heard this! We never saw anything in the paper, on the news or on the Police Blotter. Does anyone know what this was?
- Nancy Myers

Bloggers, any chance you can identify the strange sound?