Sergeant Crabulous has his claw tied with a rubber band.
Talk to Sergeant until Lucy gets the idea of having a friend to help.
This is the low-spoiler guide for "Getting the rubber band off" puzzle in Lucy Dreaming. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.