This happened about 10 years ago, but I remember it every winter.
It was January and I was at the office one fine morning. It had been freezing rain pretty much all morning. Around lunch time I proceeded to head home. I took my time driving as the roads were ridiculously slippery. As I turned onto the street where I lived, it was literally a skating rink but I VERY slowly inched my way to my house. Of course my street was pretty hilly and my house was about 1/4 of the way down a semi-steep hill and at the bottom of that hill was a 4-way stop. The salt truck had not passed by yet, so I very cautiously inched along UP the hill. As I reached the top of the hill I realized that if I proceeded down the hill, I would just slide the whole way down. But it was too late .... I really couldn't stop. As my van slid down the hill I pumped the brakes profusely to no avail. I slid past my house and thought I was going to slide all the way down the hill into the 4 way stop. Luckily (depending on how you look at it) somehow my van stopped. Unfortunately, it stopped perpendicular to the road. It was literally sideways, blocking half of the road. If another vehicle came over the hill there was no way in God's Green Earth they were going to be able to avoid smacking into my van.
I got out of my van assessing the situation when I see this truck coming up the hill (I still don't know how he was able to drive up the hill when it was a sheet of ice) and stopped in front on my van. This man got out of his truck and asked me if I had any salt. I shoe skated down my 300ft driveway to my garage to see if I could find some salt and dragged a bag of salt back to the street. When I got back to the street, the salt truck had passed by and this very kind stranger had waved the truck down to dump a bunch of salt around my van and he backed my van up for me and parked it safely at the front on my driveway for me.
I thanked the man profusely as he jumped into his truck and he waved as he drove aways saying "Your welcome... just tell everyone that a FIREMAN helped you". To this day I have no idea who that man was, but he was kind enough to stop and help me when I needed it.
That is why I love firemen.