How can I stop an export video rendering?

Hi. By accident I deleted the dot when I was supposed to export 1 frame only, so instead of rendering 1 frame I was suddenly rendering 1000000 still images! I had to quit Notch to stop it, but is there a smarter way to do it if I mess up again?

Hey Axel, The next release will have the ability to more closley monitor your export and cancel it mid-render.