I'm an expert with my umbrella :)
I specially bought a strong steel one with a hard, pointy ferrule. I can spin it around fast in either had or both, from side to side and above my head. And throw it like a spear, making it stab into a target, the ground, whatever...
Well, it's fun to play with like that when I board waiting for the train. :P
So you would use this umbrella?