What makes me concern about this case is because I happen to pass that road frequently. I guess our community is still not safe enough for females to walk by themselves, 'eh? Although robbery cases are least reported nowdays, but it is still happening here.
This is just.... my opinions on how to counter the robber IF you're unfortunately being targetted by the robber.
If you think your head is hard enough to crack that idiot's skull, headbutt is another useful method too.
Oh yea, did I mention your teeth? Biting is fun.... heheh...
You can either hook the idiot's leg, poke him with the sharp end, hit him like playing hockey, deploy the umbrella as a 'shield'.... etc.
A very useful weapon I must say.... it's another genius invention of humankind. :P
I guess that's it for today.... Heh I rarely write something like this, maybe this is my first time? Well enjoy then. :P