A night that begun mildly enough at Happy Valley last night ended in a string of sensations with two jockeys on the track after one race and a groom down before another as his horse knocked him down then took top apprentice Matthew Chadwick on a blood-curdling two-lap galloping tour of the course. Jockey Marco Chui Kwan-lai was rushed to Queen Mary Hospital after his race five mount Breaking Point crashed after interference on the home turn and Weichong Marwing (Sure Gain) went over the top of him and crashed, too. Marwing had only two rides for the night but saw, literally, the ups and downs of racing within the space of just over an hour and a half when he won the final race on Loyal Army after declaring himself fit to ride on. 'The fall was one of those things - it came out of nowhere and happened very quickly and I knew I was going to fall; the only way Sure Gain was going to avoid the other horse was by jumping over him; he has not got that kind of action,' said Marwing after his victory. 'But I felt fine after it, I feel fine now and I never thought about not riding. I will be a bit sore in the morning, I guess, but basically I'm all right, thank God, and I hope that Marco is all right, too.' Jockey Club officials said Chui was conscious and able to move his arms and legs freely following the heavy fall and CT scans had cleared him quickly of any internal bleeding on the brain, but initial reports were that he may have soft-tissue damage to his right elbow. He was kept in hospital for observation last night and stewards have adjourned their hearing into the fall until Chui is fit to give evidence. However, the fall was not the only sensation in the second half of the night, with Blade Force knocking his mafoo to the ground as he went onto the track for the final race, then took off for two laps around Happy Valley with his lead strap flailing dangerously around his legs and rider Matthew Chadwick without his feet in the stirrup irons and unable to control the three-year-old. Horse and rider parted company at their original objective, the 1,200m starting point, but Blade Force, one of the favourites, was immediately scratched from the race. Elsewhere, American jockey Aaron Gryder opened his Hong Kong account for Me Tsui Yu-sak aboard Record High and hopes the win will 'open some eyes' and the door to more chances. Gryder began his stint in mid-November, but missed several December meetings after his wife was hurt in a car crash in the United States; he went back to pick up his two young daughters to spend Christmas with him here. 'I've only had 16 rides before tonight and six of them were last Sunday so I haven't really had much opportunity to ride a winner,' he said after Record High's win at odds of 20-1 plus. 'I didn't come to just ride one though - hopefully I'll get better opportunities now and I'm hoping to extend my contract.' Brett Prebble and Darren Beadman shared the riding honours with two victories each, with Prebble's placings taking him to the Jockey Challenge honours, while Andreas Suborics was the only casualty in the stewards room. On the first night of his new club jockey stint, he copped a two-day suspension for careless riding in the fifth aboard Jolly Wongchoy, though he was not involved in the fall.