An elegant retreat to the Hamptons went sour for Madonna yesterday, as she fell ingloriously to the ground while riding a horse. As one would expect, once she hit the ground, more than 10 people rushed to her side to tend to the fallen diva. After a brief stay at the hospital, the Material Mom emerged, looking a little worse for wear but uninjured. This is not the first equestrian mishap for the star, who cracked ribs and broke a collarbone in 2005 under similar circumstances. Her ex-husband, Guy Ritchie, supposedly got on her bad side during the incident by not showing enough concern.