"Dhoom" star Uday Chopra rode bikes confidently in the hit action series, but he fell off in a real life ride. "My riding got jinxed...fell off the bike and twisted my foot...damn! Now I can't walk," tweeted Uday. These days, the 39-year-old is busy handling Yash Raj Films's Hollywood wing -- YRF Entertainment, which develops and produces feature films for the US and international market.