Jung's theory includes the concept of the "Inferior Function" — the function sitting directly opposite the one you rely on most. Because it's barely developed consciously, it tends to surface in a clumsy, hard-to-control way. Under intense stress, people often experience this inferior function taking over, sometimes described as being "gripped by the Shadow."
A normally logical, composed Thinking type might suddenly erupt emotionally under extreme stress, while a normally warm, expressive Feeling type might become unusually cynical and harshly critical.
Extraverts tend to recharge by seeking out people when stressed, while introverts recover through solitude. The trouble is that under stress, well-meaning advice often runs in the opposite direction of what actually helps — telling an introvert to "get out and see people" or an extravert to "stop bottling it up and just be alone with it."
Knowing your own recovery style matters. For introverts, even a short but real stretch of solitude tends to help more; for extraverts, a brief conversation with someone they trust often works better than being pushed to sit with it alone.
Thinking types under stress often suppress emotion and bury themselves in analysis, which can tip into becoming unusually critical or cold. Feeling types, by contrast, tend to take things more personally, becoming more emotionally reactive or easily hurt than usual.
Both responses are natural, but recognizing your own pattern in advance makes it easier to notice, in the moment, that "I'm reacting differently than I normally would."
Regardless of type, the single most useful habit under stress is a brief pause before reacting — asking yourself exactly what you're feeling right now. Knowing your default coping pattern in advance gives you the room to catch yourself, even when that pattern isn't serving you well.