It's a particle affect in UDk set to spread quite a distance and I've doubled up a few of them. Hopefully it won't be too taxing on resources! I am pretty happy with it.
Check out this video and have a look for yourself!
There is a few of us making this game now and we decided we need some sort of name to go by, I've had the name "fat pancake" floating about in my head for a while and decided to go with that. Jase put together a logo and here we are! We even managed to get a website sorted, nothing much there yet but you can find it at www.fatpancake.com