crazy lady with a knife

I ran out today at lunch to grab a sandwich and as I'm walking down the street I notice a short heavyset homeless woman walking towards me. She kneels down by some garbage bags a few steps in front of me, pulls out a large, rusty kitchen knife and with a loud grunt slashes at the garbage bag. At first I thought she just wanted to get into the bag, but by the 2nd and 3rd slash it was obvious that she was getting out some frustration. I'm now one step away from her, she gets up, looks at me knife in hand and gives out a primal grunt, I keep walking while looking over my shoulder. She stands there not looking back at me for a couple of seconds then walks off down the street.

The old lady walking a few steps ahead of me turns to me and asks if I was okay, as if I'd just undergone some life altering traumatic event. Don't get me wrong I was scared shitless but it wasn't that big a deal. The old lady then proceeds to talk to me, debating the incident for another block... what I wouldn't give for a rusty kitchen knife.