In our APA league, one of the better players always does the second ball break, and he gets his fair share of 8OBs. While playing another guy one night, he commented about how the guy that always does it has so many 8OBs in his stats. I also watched Dr. Dave's video about then, so I started focusing on it myself. If you get a good tight rack, you can really get that 8 ball moving with a good second ball break.
So one night I'm playing another one of the top guys in the league, and had a good first rack, so I'm breaking. I went with the second ball break, but for me, I also get a lot of clusters with that break. Sure enough, no 8OB, and some clusters, but they were all his. Won that rack too. Then I made the 8OB the next two racks in a row. I'm on the hill now, and he's completely deflated. Have to say, he racked that last rack just as tight as every other, and the 8 went flying, but didn't go in. He did win a couple before I finished it. That was my only time making consecutive 8OBs in a match.
And for figuring odds of consecutive occurrences, you just multiply the odds of the first event, times the odds of the second event, and so on. For example, the daily Pick-It is three numbers, with 0 through 9 available, so it's 10 to 1 odds. In that case 10 x 10 x 10 makes it a 1000 to 1 shot for picking the pick-it number. It never pays those odds, which is how the states make their money. If you say an 8OB is 25-1 odds, then twice in a row makes it 25 x 25, or 625-1 odds.