The probability of probability I am trapped by a logic premise. We know coins have no memory and each throw is a independent event. Thus, after 20 faces, it should not really matter what side you bet.
But there is also a normal distribution, and the probability of getting far to the mean. Isn´t there some sort of statistical tendency for returning to the mean? A black swan or something? The roulette record is 35 reds. If you happen to be in the 36th red in 2016, its exactly the same betting on both colors when you know the casuality is probably not gonna continue? Indeed, ine empirical terms a series of 50 reds in contrast to another random pattern is so unusual that im sure any scientist would believe the roulette is not working well, but all permutations are equally probable in the end. 
Isn´t some kind of marginal probability as soon as you get far from the mean? Is it eqully probable to get a face in the next 5 tries when you are at throw 0 than when you are at 25? 
Is it equally probable a particular random pattern of crosses and faces that 20000 faces in a row? Mathematically, an infinite or infinite -1 series of faces is possible. But whats the probability of not being equally distirbuted after 30,3000,30000 throws?

This is a common dilemma when people are first learning probability. Here's an example to help make some sense of it
If you do a large number of 15 coin flip trials, collect all of the trials where the first five coin flips were heads and call that set of coin flips $A$
When you look at the $A$ you will see that in the last ten coin flips will have on average five heads and five tails, and in total 10 heads and 5 tails. This isn't really counterintuitive, since in this set heads has a five flip advantage even though in the set of coin flips as a whole it was random that those five flips happend.
