from en.wikipedia http://en.wikipedia.org/wiki/Image:Clap_skate.png Regular ice skate and clap skate compared. I created this image for Wikipedia and hereby place it in the Public Domain. Contact me if you want the original XCF file. XCF is GIMP's original file format and preserves such things as layers and paths.
I, the author of this work, hereby release it into the public domain. This applies worldwide.
In case this is not legally possible: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.