[red-beard]

Here is a serious answer:

A compressed air chainsaw

http://www.timberkingpl.com.au/Pneumatic%20Chainsaws.htm

U.S.A
Contact:	Cletus O'Brien
Title:	President
Address:	7610 Coral Drive West Melbourne Florida 32904 U.S.A
Telephone:	1 (321) 723 3200
Facsimile:	1 (321) 984 8455
Email:	cob-industries@worldnet.att.net
Web Address:	www.cob-industries.com
Pneutool Parts and Service Co. Ltd
Canada
Contact:	Chris Gallant
Title:	Managing Director
Address:	33 Haas Road Rexdale Ontario M9W3A1 Canada
Telephone:	1 (416) 748 1200
Facsimile:	1 (416) 748 2695
Email:	sales@pneutool.com
Web Address:	www.pneutool.com