The confidence vote happens and the Government loses. Dion starts to hear from upset people all across Canada and after being pushed by frightened leadership candidates he begins to realize that the coalition may not be that great of an idea and backs away.
Layton infuriated by this goes to the GG with Gilles Duceppe and offers up a NDP/Bloc coalition be allowed to form government with Gilles Duceppe as PM since the Bloc has more seats than the NDP.
The GG appoints the duly elected MP from Laurier—Sainte-Marie as PM.
As pointed out by coalition trolls everywhere this scenario would not only be legal & would fit with parliamentary tradition, it would also be the correct thing for the GG to do, and opposing it would make you undemocratic.
Think about that for awhile the next time a coalition troll or party pundit is making the case for this coalition that does not have the balls to put their unholy alliance to a vote before the Canadian people.
BTW, it will be these same 'if it's legal' eagles to be the first to scream if PM Stephen Harper exercises his legal authority and fills the empty seats in the Senate.