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Joseph Gordon-Levitt's Premium Rush character has said only bad things come from riding a bike with brakes, and as you can see from this exclusive clip off the upcoming DVD, one of his four stunt doubles also ascribes to that life motto!

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"I've seen some studies that show bicycle messengering is one of the most dangerous jobs you can have," Austin Horse says. "I've been really lucky. I don't get injured."

Check out ETonline's exclusive behind the scenes sneak peek!

Premium Rush rides onto DVD on December 21. Click here to pre-order.