It's likely agression outbrusts I observed in some men in my family were actually meltdowns.
The best thing to do about it was literally nothing. It never ended with physical violence but they sometimes broke things they carefully repaired a bit later. All the agressive words – the best thing to do was nothing. Any reaction lead to escalation. Or, if they really hurt, wait until one calms down and then tenderly ask if he really meant them.
After this, I always heard an apology.
If the person is far away, the only thing I could think of is to instruct the people around them to stay calm and leave them alone in a safe space. Then maybe try to resolve the issue that caused the meltdown (but avoid refering to the meltdown itself - it won't help and likely trigger another one).
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Let's not confuse being normal with being mentally healthy.
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