I was helping someone at the reference desk who was asking about researching the history of a property when I heard, "Hamburger!"
I looked up to see Fannie, about 20 feet away, saying again (quite loudly), "Hamburger!"
When she got to the desk, she said, "Don't forget hamburger! ... Hamburger at Kroger's has e. coli--don't you eat it! Don't forget hamburger!"
Then she turned to one of the women I was helping and poked her, "Don't forget about the hamburger at Kroger's!" She walked away muttering to herself, her duty accomplished.
Thankfully there were no small children in her way, otherwise they too would have received a poke.