It's a round bend.... Those flyover type. He dun even slow down upon turning in. All I know is, I think he's gd. Maybe he learn some skill to Siam the fall. If not I think I have to call ambulance instead. I did stop and push his bike to the side. The frenz of his juz stunt of his fall and came to him, yet his bike still in e middle of the lane. I think the road got some stains of oil or wet. That might cause his fall. To what I know, that bend is one of the curse bend in sg!!