Laundry folding
From The Big Bang Theory Wiki
The laundry room is often the setting for heart-to-heart conversations. If the actors are supposed to be folding clothes while they deliver their lines, however, they often mess up the folding.
For example, watch Kaley folding towels during her second conversation with Leonard in The Vartabedian Conundrum or Sheldon folding a blue T-Shirt twice in The Bad Fish Paradigm.
