Slipstream, thank you for sharing this. Not sure if they can do curvy shapes but it is pretty cool either way. There are a lot of chips flying too but those could be the pieces between the "cuts". You would need a vent/filter system to capture all of that vaporized material too.
Here it is on white stock:
[video=youtube_share;5FbdtB2lTdU]http://youtu.be/5FbdtB2lTdU[/video]