Yesterday at night i saw a plane with three lights on it, there were two white lights a fair distance from each other that were constantly on at all times and one white light in the middle that was blinking every once in a while. After a few minutes the white light in the middle started blinking at 4 times the normal speed and the whole plane stopped flying midair and stayed there for about 5 minutes then I left and when I came back it wasn't there any more. I didn't see the actual plane because it was too dark though. Is this normal plane behaviour?