The shock then fear, hopelessness and uncertainty that gripped Sha Tin and the racing fraternity following the horror fall in Sundays Hong Kong Sprint is something no one who was involved will ever forget.It felt like an eternity before those emotions slowly gave way to relief and amazement as the day wore on and news filtered through that jockeys Zac Purton, Lyle Hewitson and Yuichi Fukunaga were in a stable condition in