On my flight from Fayetteville, Arkansas to Chicago I looked out the window and saw this enormous plume! It was fantastic. This was on December 1st, about 2 hours into the flight (I think). Curious about what it could have been, I looked up online and came across dutch's video. Can't say the whole controlled burn seems right , and after seeing this out of the airplane window, well - those plumes in his video do look tall and narrow just like this one!