Simon Cowell now owes David Walliams his life, after the comic saved his fellow ' Britain's Got Talent ' judge from choking on a mint. The father-to-be began coughing after the mint got stuck in this throat at auditions for the show in Birmingham on Monday. After some slaps on the back from fellow judge Amanda Holden failed to dislodge it, David swung into action with an emergency Heimlich ...