Odds of 3 people with pocket pairs all flopping a set in holdem

I think I got it [img]/images/graemlins/smile.gif[/img].
All 3 players need to get a set. So after the first player gets his set, with the first flop card. that takes 2 cards, not one, out of the pool. The card he drew to get his set, and the other, 4th card of that value, that will not help the other 2 players get their set.

Eric