Why why why keep an umbrella up where it isn’t raining?
If you’re walking ‘round town and it’s bucketing down, you’ll naturally find the most congested areas are under shop awnings. This, obviously, is because rain does not fall there.
Yet, despite this, there is always a contingent that persist in barging through the crowds, brollies aloft at full spread.
Apart from just looking silly, this is a display of supreme ignorance and/or carelessness as to the physical well-being of their fellow pedestrians when they present a circle of spikes at a dangerous coincidence to eye height (mine in particular).