However, I wasn't focused on what he was doing; I felt it was all about luck, so personally, I just played slots without paying attention to any particular patterns. So, what about you? Are you one of those people?
I have gone through these experience several times and I was able to make profits in the consistent winning after it feels like I have just stepped on the winning toes but that happens once in a while and only lasts in the short while.
So OP, I want you to understand something, that your friend did not actual catch the house at the court of his own ability but of luck.
So don't get carried away that you can win in the slot game with your ability of applying some strategies.
If in doubt, you can ask that your friend about his state of emotions because I am sure he will tell you he is not confident (guaranteed) on the future outcome whenever he places new games. Only that he was just too lucky at that point of time