You could classify a lot of natural events as phenomena, from the Morroccan goats that climb the argan trees to eat the fruit, to the beautiful aurora borealis that you can observe in Northern latitudes. One of the former would lend it's self nicely to a humorous entry perhaps, the second one is more akin to a demo effect. You choose... You can choose a natural or man made one.
Here are a few ideas to get your creative juices flowing!
Lightning Storm, Crop Circles,Ufos!, Denmarks Black Sun,Meteor Shower, Contrails and cloud formations., Tornado, Light Refraction, Lunar Eclipse
The challenge of course is to choose a phenomena which would lend it's self nicely to code, then code your effect and make it look awesome.
In your entry - please provide a brief description of the phenomena you've used as an inspiration.
Here are a few examples of natural and man made phenomena in action:
Upward Lightning:
[youtube]RDDfkKEa2ls[/youtube]
Light Dispersion:
[youtube]p27LyZcXfCM[/youtube]
Denmarks Black Sun:
[youtube]V71hz9wNsgs[/youtube]
Water Vortex:
[youtube]GkbMJSeI25Q[/youtube]
Tesla Coils;
[youtube]PdrqdW4Miao[/youtube]
Feel free to choose something else if there's something you think will look really cool!
Here are the rules.