yea mate, same one, I was surprised I got through that too, all I did was add a layer of fizzle (explosion, point light, alpha) the same way you did the skeleton.., worked for me
man you are kicking arse I dig the way the saucer seems to be itself alive (then there is the cabin).., great imagination mate. seems thats what its all about once you have the skills, and you got 'em!
grading is another skill that will come when needed, the skills just keep coming..,
take it easy and life will be easy