Avalanche Jumper is my favourite piece of clothing, made to date. It's wild and fun, perfect to spice up those dull, grey, winter evenings. It's made in 2 colours, but I'm sure it would look cool made simply in one, too!
I marked this pattern, as advanced, but I believe with photos and detailed instructions, intermediate crocheters shouldn't have a problem following it.
As always, there is contact info provided, if you encounter any issues with the pattern.
Have fun with it!