its usually sensory things for me too.
i dont know anyway to control it, mainly because it lacks the stage of the concious mind. where one is able to process it before acting on it. for me, its like im tolerating mild things, and then BAM it happens and i am only aware prior and after i snapped. (it also happens when i try to get to myself to calm down, and people see "leave me alone" as to mean "im in distress, please come make me talk to you and interact with you".) the words that come out in these moments are very direct, "shut up", "stop", "i said(snaps) leave me alone", "go away", "no" , and then i cry and run off (if im not cornered). if i am cornered, i usually drop to the ground and cry while taking out the overwhelming frustrations out on myself. but when i snap, its just too sudden for me to even catch it before it happens. its like a surge of adrenilan with the "flight or fight" body responses.
however, when im on the right stimulant and the right doseing that happens a lot more less. but its uncomfortable when it happens and my system catches it before it snaps. (kind of like how a hiccup feels when its coming on, but them it sudden dissapears.
when i was younger instead of words, it was growls with anger type of scream growls.
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disclaimer: there are quite a few "tapp-o"s while using my phone. if i dont recognize it, and if it doesnt seem to make sense, then the chances of it being a tapp-o (typo) are very high.
*currently using iPhone 4*