various examples of double knots and single knots at the end of a bag.
Is One Allowed to Clean a Room in a Shul After a Kiddush or שלום זכר (Shalom Zachar), Etc., Even Though Nobody's Going Back...
to clog a small crack in a pipe. Turning off gas range. Putting on, taking off smoke detector. Unscrewing the bulb that's off;