Taken from an article seen here:
http://www.180aroundtheworld.com/123/bike-thieves-in-amsterdam
“…A true Amsterdam bike thief noticed the commotion and offered his services to remove the lock. He opened his jacket to reveal a portable tool shed and, for a small fee, did the job. He was also nice enough to give us a rundown of what locks we should and shouldn’t have if we’d like to ensure our bikes are safe from him.
His top pick to deter him: a Viro chain lock.”
