As I am closer to (a few months away) from having done over 30000 miles on shifty vespas and over 20 years (combined years) of riding on shifty vespas alone here I am to share a fall.
Basically I was turning to the left at lower speed and there was a ton of loose gravel. The front tire locked easily and skidded and I felt very fast, so fast that I could only open my arms and palms to "cushion" the fall.
Unfortunately I was not wearing the gloves and unfortunately the road was very coarse. To my advantage I have very meaty hands (gorilla hands), very cushy like a farmer but still... Initially it hurt a lot, it also hurt when the wife was cleaning the wounds.
I normally ride my scooter around the neighborhood at low speeds, I wear the glove about 50% of the time because I don't go fast. As it turns out a 10-15 mph fall can also do a lot of damage if you fall fast in the wrong angle. Lessons learned, wear the gloves even around the block, you never know. I did have the helmet (I always do).
This PX150 used to be pristine. Now is approaching its 20 year mark and it is starting to show battle scars. All I can say is wear the gloves and always look for loose gravel/dirt although sometimes is impossible to spot. This happened to me at dusk. Be safe out there.