Stupid Young Man

I tried to pass her on the left but she drifted that way.
She was elderly, had a cane and walked slowly.
I stopped, then started to walk past her on the right.
She decided she wanted to go that way and turned. Her cane hit my leg.
"Stupid young man!" she said.
I looked at her.
What was I supposed to do: engage her on the fact that frustration with her situation was nothing to do with me or rugby tackle her yelling 'Who's your Daddy?'?
"Sorry," I said.
I walked on, shaking my head.
Still, she did call me young.