various examples of double knots and single knots at the end of a bag.
understanding the two views with "דרך לכלוך" (coloring destructively). (Wiping one's hands on a towel from grape juice, blood, pomegranate, colored ices, etc.);
How to Work with the Usage of a Telephone in Cases of Emergency on Shabbos;
opening a bag where it is stapled together;