James Kingston has made videos of himself around the world, taking part in the urban sport known as free running or parkour. He uses street furniture as an obstacle course, jumping from building to building, often at great heights.
Now a video of his performance has had 140 thousand hits online - but the University of Cambridge is not happy - complaining that he is trespassing on its property.
ITV Anglia spoke to James Kingston on the phone. We began by asking him if he accepted Cambridge University's point that he was trespassing on its property and putting his life and others in danger.