Not easy, when we're emotions then everything will be hard to be controlled, I never experienced it seihngga makes about 3 btc lost in just over 5 hours. self control is very important so that we will not lose.
It's true, when your emotion starts to show while you are losing and winning, you will really lose control... That is one reason why a gambler, after losing, he wants to deposit a new fund to his bankroll, he wants win immediately without his feeling calming down...
Same as in winning, when you win a lot, instead of withdrawing your profit, you'll make another bet, just in case, and you will use bigger bets, and start to lose, then you will be back to depositing new funds again... It will be a cycle most of the time if you don't control your emotion...
