LONDON, March 29 (UPI) -- Of the 157 people who have paid Virgin Galactic $200,000 for a brief space flight in 2008, those with breast implants may find themselves flat out of luck.

Company spokesman Will Whitehorn told The Sun safety concerns have come to light for those who want to be launched in groups of eight to an altitude of more than 60 miles for 7 minutes of weightlessness.

"We've discovered there may well be issues with breast augmentation," he said. "We're not sure whether they could stand the trip -- they could well explode."