This morning on the way to work I was attacked by a large umbrella very like this one out on the footpath. It was a cool, windy morning and the people had just put it up and left it without any weights holding it down. Maybe they were inside getting them. Thankfully I say that a passerby ran in to help, then the people from the shop dashed out and dragged it away.
Let me urge you to first put the weights on an umbrella before opening it.