Well where have you been hiding? That was the reaction of a mum who was expecting to give birth to triplets but then had identical QUADS!
Kimberly Fugate, 42, from Mississippi, US, was in the delivery room with husband Craig when her doctor told her the surprising news: "There are more feet."
The quadruplets - all girls - were born on February 8 at the University of Mississippi Medical Center in Jackson almost 13 weeks premature. At the moment, they are in intensive care.
The fourth girl had somehow been concealed from ultrasound imaging throughout Kimberley's pregnancy.
The parents have named the babies Kenleigh, Kristen, Kayleigh and Kelsey. They already have a 10-year-old daughter and (perhaps unsurprisingly) do not plan to have any more children.
Kimberley told the Clarion-Ledger newspaper: "This is it!"
Dr James Bofill, professor of maternal foetal medicine, said the odds of spontaneous quadruplets are 1 in 729,000.
In Kimberley's case, the odds are even smaller because their girls split from a single egg, meaning the siblings are identical.
Dr Bofill said: "Those odds are incalculable."