Excuse me sir

I was doing the grocery shopping at Trader Joe's later in the day than usual and it was pretty crowded.  As I was putting the ground turkey on my shopping cart I half-heard a faint "Excuse me sir" from a woman behind me and I hurried to get the shopping cart out of her way as I was kind of blocking the path.  As I walked away I again heard a little more loudly, but not much, "Excuse me sir."  I turned around and an Asian woman looked at me and said: "I think that's my cart".

It was.