So, your shields are down. You get hit with a frag weapon like a kiloton cannon round or a 800F mag or something. Your speakers go 'Breek!' and your screen flashes red...for about ten seconds.
Please make fragmentation weapons less likely to induce seizures. The red flash is a useful warning that my shields have gone down and I'm taking armor damage, but the repeated flashes for multiple simultaneous hits from one missile are very irritating. A single flash is sufficient.