Logging out is the best option but not everyone is able to do that.
When they're so emotional and having that kind of panic attack, it's hard to stop but as soon as we feel that.
We have to do something and have to beat it or else, it is us that we will be beaten not just with bets but also with our emotion.
That's what we called self-control if you can manage to beat that pressure and able to quit your way when needed. Being responsible is your duty to protect your money together with the time that you'll going to consume, aside from that, you also preventing yourself getting deeply engage as you choose to stop before your emotions dominates you.
Quitting when need is one good chance for most gamblers to avoid unexpected losses.
I guess only a few is able to do that when they're in a tough situation where their emotions are high. So, able to control oneself is also a skill that others don't know how to do.
While the experienced ones can do that easy or sometimes they can't as well when their emotions are ticking too.