Eating Hard Food When It Might Make One's Gums Bleed, and Removing Meat Stuck in One's Teeth When Gums Might Bleed;
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...
More Important Information About a Fly Caught Between the Screen and Window;