A mystery woman forked over about $300, and a $40 tip, to cover lunch for the 60 or so guests dining at Denny's in the Sacramento area.

Who was she? Why did she do it?

A Denny's manager was sworn to secrecy.

The woman "was very persistent and wanted to do it."

All the manager would reveal is she was a mom in her mid-30s with two young children, maybe 7 and 10. She tried to find out why the woman wanted to pay for the entire restaurant, even asking if she'd won the lottery, but didn't get an answer.

I know some people who've had the car in front of them pay for their drink. Has anything like this ever happened to you?