Once a year in Bristol there is a balloon fiesta. Bristol is very much used to seeing hot air balloons as soon as there is any nice weather and sunny skies it's almost inevitable that you'll see a couple or more balloons. However, this fiesta, apart from being a massive fun fair etc, has an awesome sight called the night glow, where hot air balloons are used like disco lights.
Here is a video of the finale for this year. If you've never seen it before in real life, its something that will make the eyes pop out of your head the first time you do see it.
I've got a very small set of photos too of the event in my image gallery here.
You can feel the heat of those flames in the crowd!