I myself have a very personal interest in mascots of that sort, as I once became impaled on one! It is a story of unimaginable folly, and I was lucky to come out of it with no more damage than two permanent scars.
In the summer of 1940, when I was 12, I went to stay with my friend Julia, and her dog 'Hitler', who lived on a pig farm in the country – (oh! the stink!). On this particular day there was a whole crowd of small children, of which Julia and I were the eldest, playing some distance from the farmhouse, and an aunt was dispatched to bring us back in the car for lunch. Crazily, we all clambered up onto the running boards, bonnet and even roof of the car. Julia and I having the longest legs took the top position, facing forwards, with said legs presumably obscuring the driver’s view to some extent.
The car had begun to roll slowly down the lane when the dog decided he wanted a ride too, and made a leap for the bonnet. Aunt braked violently, children shot forwards onto the ground, but poor Judith’s travel was interrupted by contact with the car mascot, a penetrative design which passed through a portion of her gluteus maximus and out again, narrowly missing the sciatic nerve. I managed to pull myself off while sensation was still numbed, and when we had all got safely and more circumspectly back to the farm, the local GP was sent for and I was stitched up, adequately though not elegantly. That has not mattered though, as my buttocks have never been much to write home about and I never wanted to flaunt them.
The nearest I have been able to find to my recollection of this damaging weapon, is the 1933 Buick Winged 8 pictured below, although I think it was more likely a British car. It is not the sharpest of mascots to be seen in the collections, but it was quite sharp enough. In these days of seat harnesses and many other safety regulations, you might think that the mounting of such things on car bonnets would be illegal, but subject to certain restrictions it can still be done. If you want to know the English law in the matter, have a look at the website of Louis Lejeune, mascot manufacturer.