Lucky him to win a good amount is just 15 minutes, I guess his luck is active that time though. But not all of the time that he will gamble, the same thing will going to happen, sometimes we just got lucky, and that's it or maybe the house are just tempting us, for us to return and gambling again, but this time we are going to lose.
It was a smart idea that he called it a day when he won a good amount, because if he stay longer their and hoping that he could have double that certain amount, then probably he lost it all.
i am sure that is only for a few people that will get winning money in short time, but mostly the gamblers can not get win in that short time. rather than to get winning, they only get loss for playing games and we can see this is happen for almost of gamblers. for me, i think its better to save our winning money into our account or our wallet.