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Last Modified: 2:01pm 10 Aug 11

Background on Jackie Chan's jump

The information here is extracted from a much larger and more colorful page,
http://www.newline.com/jackiechan/rumble/Behind.html

Go there for the full story ...

In the movie Rumble in the Bronx, Jackie Chan is chased by a gang of hoodlums through a parking garage. He finds himself trapped on the roof of the garage as the bad guys close in. In a desperate bid to escape, he leaps off the roof!

Click on the image above to watch a Quicktime clip of the jump.

The most chilling stunt in 'Rumble' comes when Jackie, trapped on a rooftop by pursuers, leaps to a balcony on an adjoining building -- a drop of fifteen feet to a three-foot target 26-feet away. "That's a small target," says director Stanley Tong. "You really can't even see where you're aiming before you jump."

After trying the stunt himself with a cable harness, the director concluded that the leap wouldn't look real, and might even be more dangerous if it were done that way.

Instead, he had a 24-foot platform built on the second floor for the star to rehearse on, enabling him to calibrate the exact path he would have to run before leaping. The path was then marked with tape on the roof of the building, and Jackie Chan executed the blind leap with nothing but an airbag to cushion his fall if he missed and fell eight floors to the ground.

So, the questions are:

  1. How fast must Jackie have been running when he ran off the parking garage? Assume that his initial velocity was horizontal.
  2. The landing area was 3 feet by 3 feet. What was Jackie's margin of error in speed? In other words, how much faster or slower could he have been running and still land on the platform?


Adapted from Prof. Michael Richmond. Sorry, we could not find this page | RIT CIS - Center for Imaging Science

Sorry, we could not find this page

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Last Modified: 2:01pm 10 Aug 11