Here's one that I read about elsewhere on the web.

I apologize for the notation I am using but it is simple enough.
Here are the two relevant hands:

Hero: Q-Q
Villain A-Q

Flop: 5-6-Q

The question is what are the odds on the next two cards being the aces that Villain needs to win?

The estimates I have seen range from 22-1 to 400-1, and another estimate from an odds tool that suggested Villain has a 0.95% chance to win. (The point being that he did draw the cards he needed.)
So what are the odds? Your thoughts please.