IFOs
Hot Air Balloons
A powerful flame is lit
intermitently to keep the air inside the balloon hot enough to stay afloat.
This flame is extremely bright and can often be seen, even during daylight
hours. At night time it can light up the whole of the inside of the balloon in
a fiery orange glow. The flame also makes a loud roaring sound, that can
sometimes be heard from the ground.
Because of the way that they
are propelled through the air, hot air balloons usually glide very slowly
across the sky, and can also hover completely still if required.

