Crazy People and Karma Testing GitHub as Blogging Platform

Here's a conversation I recently had with one of my neighbors - a woman in her late forties / early fifties.

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neighbor: (Slightly agitated and partially concealed by her front door..) "I know you pick up after your dog, but I don't want him on my lawn AT ALL."

me: (Without sarcasm.) "OK. We'll do our best." (Glancing down at her lawn I notice it is mostly dandelions and something else that looks like another pretty weed...)

neighbor: (On the verge of lunacy, she quickly opens her door wider and takes one step out..) "No! You'll do exactly as I say! [something..something...something]"

me: (Using all my mental powers of self control and without sarcasm and only the slightest inflection on the word "nice.") "Have a nice day." (Mason (the dog) and I quickly walk away.. Mason is still bouncing around wanting to play with the crazy lady...)

neighbor: (With my mental powers exhausted, I didn't exactly hear her parting remarks.. something to the effect: "Good day to you TOO SIR!")

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That kind of sh*t really f**ks my sh*t right up for the rest of the day. Many days later, I've let the incident go and "Will do my best" to keep my dog off her lawn. Still, I wonder what makes a person behave like that? Is she:

On the verge of a nervous breakdown?

Feeling so helplessly out of control that she desperately needs to feel like she is in control of SOMETHING?

Off her meds?

On someone else's meds?

Satan?

This brings me to the topic of Karma or more/less precisely, "What goes around, comes around." I'm glad I stayed relatively quiet and did not exchange barbs with this woman. Life is too short, and Karmic, to allow myself to be mired in petty disputes. I only wish my superego could nudge my ego like this a little more often.