Have you...umbrella

Have you been in a situation like this; it's raining, you go outside, open the umbrella, walk for some time without noticing that the rain has stopped and it's even sunny :) and you keep walking with your umbrella opened ...
Some people look strangely at you and you don't understand why :)

When you do notice that it doesn't rain any more, then you keep looking at people that haven't noticed it yet :)