Zach Goebelt of www.OutDoorInstallation.com showed me a bulge on his arm which he calls the "waller's muscle" that appears on his wrist when he flexes it. He recons anyone who builds walls a lot and is working lifting up big stones every day will be exercising this particular muscle a lot and gradually developing a bump here. I hadn't noticed and was surprised to see I had a somewhat pronounced muscle thing happening on my wrist too. Jared Flynn who was dining with us that evening added that this was the 'real' waller's muscle and not to be confused or compared with something else. Hmmm.