Mary-Kate Olsen had a close call during a bicycle ride in New York last month, when she almost collided with another cyclist in the city.

The star was enjoying a sporty day out with her boyfriend Nate Lowman in the city's East Village on April 29. But Olsen gave her boyfriend a scare by choosing to ride against the flow of traffic - and cut up another cyclist.

A source tells the National Enquirer, "Other bikers were riding with traffic, while Mary-Kate and Nate were riding against traffic so they should have been the ones to move out of the way. But they didn't, and Mary-Kate nearly collided with one of the bikers going the other way. He (Lowman) yelled, 'You're crazy, Mary-Kate! You almost killed us!"

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(This news article provided by World Entertainment News Network)