Or "you get heads or tails" or "it spins through the air before bouncing around a bit".

I think most of the examples one could give can be mitigated by rewording your expectations. Which, incidentally, is the reason for the quote in the first place.

Well, by that logic, everything could be reduced to "stuff might happen".

Right, and if you reduce a quote to a tautology, you miss the point.

It's like complaining that a metaphor isn't literal.

Not entirely. I don't really have a quarrel with the quotes message (I wouldn't really care, TBH), but with how it's used. And sadly, it usually is used to dismiss someone's efforts by misinterpreting the other person's motives (or "expectations") - which coincides with exactly this pattern.

So basically, whenever I read the phrase so far (luckily, I never had to hear it in a personal discussion yet), someone uses it to belittle someone else without taking his/her perspective into account. Or any changes to the world as a whole for that matter.

I can see that, thanks for sticking with me :)