I've only recently discovered there's a common pattern to meltdowns and a name for the behaviour leading up to one - rumbling (some info here
DS gets very hyper or agressive before a meltdown, his ears and cheeks go red and he gets argumentative/antagonistic and growls. If I engage in conversation with DS at all during his rumbling stage I seem to make things worse. What he needs is time alone to calm himself by rocking or sitting somewhere with no sensory stimuli and sometimes we can prevent a meltdown, sometimes it just puts it off until later. If we are somewhere with nowhere for him to calm down or its reached a certain point there's nothing we can do but keep everybody safe and wait for it to burn itself out.
Does anyone else's child show particular signs when things are getting too much? what symptoms do they display and what do you do to try and head it off? does it work?