Hello Angel, welcome! The site will always provide a mixture of humourous answers - and the odd sensible one! Sheep can get up off their backs - this is an urban myth. Similarly, penguins can also get up if they fall over backwards from watching Air Force planes flying over the Falkland Islands - this was a famous joke put about by sailors who were over there, advising gullible people that they were on 'penguin patrol' - helping penguins back on their feet. It's just a myth. See you soon.