Seems like a funny trivia story, but look at how Bloomberg, news sources for the financial world, described it:
Canadian Lawmakers Accidentally Pass Budget in House
June 6 (Bloomberg) -- The Canadian government's C$227 billion ($204 billion) budget was passed in the House of Commons after opposition lawmakers accidentally failed to stand up to debate the spending plan.
That's right. They forgot to stand up, and $227 billion dollars worth of budget was passed without any debate. Not only are the Liberals a danger to themselves now, they are a danger to the proper functioning of Parliament!