Seeing the same flop

[MickeyHoldem]

During my last trip to my local casino the dealer flopped the same cards twice in a row. (they weren't in the same order) This led to an interesting discussion on the odds of this happening again. To make a long story short... we all agreed it was remote! (odds withheld to protect the ignorant) [img]/images/graemlins/grin.gif[/img]

A more interesting discussion insued about how long you would have to play before you had an even money (or better) chance of seeing 2 identical flops during the same session. (not necessarily back to back) Assume you see 30 flops an hour <insert chuckles here>, how long do you have to play? (assume order does NOT matter)