BOth my grandfathers would get very violent before they had a TIA. they would calm down, then the tia would happen. Its pretty common actually.
I think I understand now....You may have the timing of events a little off.
If you get violent BEFORE parts of your brain are being blood starved, that just makes you an asshole.
If your grandfathers were exhibiting symptoms,
that is the onset of the TIA - not afterwards.