Pretty sure I did.
I was waiting for the pedestrian lights to change on a main road on the way to meet my mates in the pub when I saw an elderly couple with a very small toddler approaching the other side.
As I've had one that was a definite flight risk (I lost count of the number of times I'd carried her somewhere by the back straps of her reins like a rather irate handbag), I could tell she was already out of reach and was very near the kerb. The car approaching on my side had obviously seen what was developing/I was doing, so slowed and stopped as I stepped out onto the crossing.
The driver that came screaming up the road on their side, however, didn't have a chance to see all of about 28 inches of toddler due to speed, the size of the car and because of cars parked slightly further down. He couldn't help but notice me going from purposeful walk to warp speed straight in front him, though, and slammed on the brakes, screeching to a stop about ten foot past the crossing and getting out to have a go at me because the lights were still green. I think he was quite possibly angry because he missed me by about an inch, if that, as I felt the wheelarch brush against the back of my leg.
However, he stopped at the 'What the fuck do y-' stage as he could then see me handing this child to the Grandparents/Great Grandparents, changed to 'Oh, fucking hell' and sighed.
With the size of the kid, the speed he was going and the height of his bumper, there's no way the toddler would have survived being hit. Not entirely convinced I would have either. But small child lived to run off another day - and the G/GPs only had a minor near death experience of their own.
Had the absolute piss ripped out of me later by my mates after I told them why exactly I was drinking a goldfish bowl sized gin instead of my usual lemonade.
The buggers sang the Superman theme every time I walked into the pub for about a month afterwards.