Oh my, I have absolutely no idea, never seen this (in 32 years on the island). Only one thing comes to mind: This being olive harvest period, perhaps they just made a point (which one?) and they did not shake the leaves off their hair? You do get quite a few leaves falling off the tree when harvesting. But other than that...

Glad you liked your vacation. It's been the mildest and least rainy fall since I came here, though with a little more wind than what I'd have liked (fishing!).