He'll use it to illustrate one of the points about "Quit Stealing" (and do something useful with your hands so you have something to share with those in need) from Ephesians 4:28. One form of stealing is weighting the scale. Now, this is not necessarily the background of this particular potato....You'll have to go to Jackie's post to see for yourself!
The major emphasis of the sermon will be WORK! WORK WITH YOUR HANDS! WORK HARD! Quit looking for "easy". Don't look for a way to avoid work. Teach your children to work by word and example. It's a message our society needs to hear. It's truth I need to practice.