The bike lock that fights back!

This bike lock deters the opportunist thief by making the abuser's experience as unpleasant as possible without having a detrimental effect on the user.

SmartLock is a cable lock that has cores of compressed air and liquid running through its body. If cut, the liquids spray out over the perpetrator, his tools, the bike and the scene of the crime. A bike that has been stolen will be covered in coloured dye (the dye renders the bike undesirable and therefore unsellable) as well as transluscent Smartwater - an invisible forensic property marking liquid.

More information at the inventor's website... Watch the video as well.