Two Identical flops

Just curious and thought someone with a better understanding of just how rare or not rare this is. four tabeling 5-10 on party poker one day recently. On two of the four tables at just near the very same time, flops coming within seconds of one another and they are identical. From left to right each card is the same on two deifferent tables. 2 [img]/images/graemlins/diamond.gif[/img] 7 [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/club.gif[/img] Just how rare is this really?