So wednesday morning, my father-in-law was at work. He works for EDD, handling peoples taxes and disabilities. Around 8:30 in the morning, he started feeling very weak and his head suddenly started hurting like a massive migraine was coming on out of the blue, and then would go away suddenly, but then come back again very suddenly as well. While he was walking to the printer to pick up what he had printed, his knees suddenly went to jelly. He dropped to his knees and could not get up, nor think straight. Confused, he hugged the wall to catch himself, only to find himself on the floor face down, with his iPhone 4s falling to the ground beside his face.
He had suffered a severe stroke. Still confused and unable to speak very well, he tried calling out for help, only to have his cries return void as he was alone on his level in the building. No one was around. All he had near him was his iPhone, which had opened up to Siri being close to his face when he dropped it. Unable to walk or move his entire left side of his body, he desperately called out "Call Gill", which was his boss, who was on another level of the building.
Because he was able to hands free call his boss via Siri, his life was able to be saved and the effects of the stroke were 70% reversed due to getting a drug just in time that reverses the effects of strokes if taken in the small window that it requires. Because of Siri, he was able to get this drug. If he had not been able to call anyone, he would have laid there for hours, possibly his entire shift before someone came in and found him, in which case he might have been permanently paralyzed, or worse.
Because of that technology, he is on the road to recovery now. If it were not for Siri, things would have been a lot worse.