This post is based on a post I made in the official Fighting Fantasy Forum back in February 2010.
However, if you are lucky, shouldn't you always get the 'good' result even if it looks bad? I know your aim was probably to avoid the missiles but if fate is smiling upon you then shouldn't you be hit if you pass? Even if it looks bad at the time, you will ultimately win so surely its the result you want. Or should being luck rolls not look at the 'bigger picture' of the book and only show a short term gain?
Here's an example:
At the beginning of Black Vein Prophecy, if you fail a luck roll, you get struck by something that gives you multicoloured scales. At the time, it looks bad, but you actually need them to win.
You are walking down a corridor in a dungeon and a trapdoor opens in front of you. You can test your luck to avoid it. If you do avoid it, you carry on down the corridor and get killed by a horde of zombies. If you don't avoid it, you fall into another level of the dungeon and lose stamina. Should you fall in the trapdoor if you are lucky or unlucky?
Here's another one (this is purely hypothetical as I wouldn't do this in a book):
You are on paragraph 1 in a book and trapped in a dungeon. You are searching for an exit to the surface, which depends on luck. If you find it, you get to the surface and ultimately lose the game. If you don't, you have to go deeper into the dungeon and fight a tough monster but you find an item which means you win at the end. Should you find the secret door if you are lucky or unlucky?