Eventually something will hit it. Be ready for that eventuality. A skateboard helmet is light, but surprisingly sturdy. Being of open-face design, it doesn’t get in the way of eating, drinking, licking postage stamps etc. and can be decorated with small herbs; I favour the chive.
I’m sure there are spiders living behind my noticeboard. I can hear them whispering to each other and giggling at each other’s arachnid quips. I wonder if they post their own notices on the back of the board, which they consider to be the front? If so, perhaps they have discussions about the human they suspect lives on the back of their noticeboard, commenting on the fact that they’re sure they can hear the occasional, unmistakable sound of a chive falling from his skateboard helmet.