(Boneh-בונה Ep. 80) (#800) Using whipped cream on Shabbos; opening a lid of a bottle that's very tight; tissue boxes.

הכנה ליום אחר (Preparations for a Weekday): Washing Dishes on Shabbos for Sunday. Releasing a Halachic Vow (הַתָּרַת נְדָרִים);

a candelabra (lichter); loose leg in chair or table; assembling model plane model boat; wheel of a stroller; winding a watch;

When One Is Walking Down the Block, Do They Have to Worry About Surveillance or Security Cameras?;