Understanding "פסיק רישא דלא ניחא ליה" (inevitable results from one's permissible action whereby one receives no benefit from).
using whipped cream on Shabbos; opening a lid of a bottle that's very tight; tissue boxes;
Some more important concepts about "SHEMA YISCHOK" (one might come to squeeze out a garment).
When One Is Walking Down the Block, Do They Have to Worry About Surveillance or Security Cameras?;