Warning: Bad Language.
We should probably clear a few things up.
Cliff diving is dangerous. Cliff diving at night is really dangerous. Cliff diving at night while lit on fire, however, is sensible and logistically sound.
Not only does the glow of the flames from your burning clothes which ravenously tries to ignite and consume your flesh provide proper lighting, but it also makes you more visible to other night cliff divers who might happen to leap at the same moment.