If you know anyone who seems really chill to the point of being virtually indestructible, like nothing could ever bother them in any way, could get hit by a train and just shake it off and be totally fine, laughing it off as soon as they've dusted themselves off and stopped bleeding, but who occasionally just randomly falls apart to complete fucking smithereens with seemingly no cause nor warning, only to get back up again a few minutes/hours/days later like "ok yeah I'm fine again that was weird lmao", and you've ever wondered what the fuck is up with that:

They are actually not ok and most likely are not ok at any point. The whole "hardiest person you know who just collapses randomly sometimes" thing isn't a deliberately constructed façade, as a matter of fact it might be something that they actually personally believe themselves to be. But in reality this is somebody who's either unintentionally learned or has been deliberately trained to hide negative emotions and mask symptoms at all costs, as the #1 priority that goes over any other survival needs.

So even though it may look like they go from 1 to 100 completely at random and unpredictably, and then swing right back again to being totally fine, you have no way of knowing how long they've been at 95% before the last line of defense broke down and the system collapsed. And once they flip back up, odds are that they just managed to scrape their shit back together again just enough to get their backup masking systems running. The "check engine" light never turned on because the wire was clipped years ago.

If this is you, this is your callout to seek some sort of help. I'm telling on everyone in this room including myself.