Is one allowed to drink the juices which oozed out during eating; grapefruit issues.
How Do We Understand the Concept of Combing or Brushing One's Hair?;
Putting the Little Plastic or Rubber Cups on the Bottom of Chairs or Tables and Blowing Bubbles on Shabbos;
Folding a shirt collar, flipping up cuffs from pants, hanging up pants with a very sharp crease on a hanger, folding tablecloths and sheets...