(Inspired by the little blizzard that blew through here a couple of weeks ago.)
1. Acquire an arm from a department-store mannequin.
2. Wait for a fairly big snowstorm.
3. While shoveling snow, place the arm in an upward-directed position and then pile snow around and on top of it.
4. Wait several weeks or months until the outstretched hand emerges from the melting now.
Dressing the arm in a coat sleeve and mitten is optional.