My grandmother, God bless her, started walking when she was in her sixties. Now she's 95 and we don't know where the hell she is.
Variant: My grandmother started walking five miles a day when she was sixty. She's ninety-seven now, and we don't know where the hell she is.
As quoted in: Newsweek, Volume 119, Issues 18-26 (1992), p. 121