consecutive BJ's
No, it is nothing remotely like 192,000 to 1 -- UNLESS the precise 4 hand sequence is predicted in advance.
That is to say, that with every hand that you play you create yet another 4 hand sequence starting point.
Ergo, you will have hundreds, even thousands of chances to pull 4 consecutive B J' s in the course of just a year.
On an interesting note, I was playing single deck in No. Nevada once when the dealer gave herself 4 consecutive 'snappers'.
It turned out that black chip players with skill were not barred at J.A.'s Nugget in Sparks.
They were simply cheated until they "got the message".