"Those Things Are Dangerous"

I'm riding to work today on the Harley and its pretty damn cold, I'm all bundled up and not in the greatest of moods. I'm about 1 mile from work at a light and a lady pulls up to me in a older Chevy Suburban rolls down her window and says to me, "those things are dangerous" I looked her and said "excuse me", she said "Motorcycles are dangerous, i hope you don't have a family" I said, "They aren't as dangerous as saying some stupid shit like that to a biker, and By the way, enjoy your 8 miles a gallon as you drive your Suburban and destroy the earth." She rolled up her window and drove away w/ a disgusted look on her face like she couldn't believe I said that, I couldn't believe SHE said that, what posseses someone to say something like that in that situation? Im happy w/ how I handled it, but still pissed at the audacity of that lady...