omg.. This one time.. At bandcamp.. The flop came 2h 6s 9c for one hand and the very next hand it came 5s Qs Ad. What are the odds??!

Answer: the very same as any 3 specific cards multiplied by 3 more specific cards. Doesn't matter if it's Ah Ac Ad and then Kc Ks Kh or those two flops above.