Practical applications with "מצוה" in S'char shabbos.
Eating Hard Food When It Might Make One's Gums Bleed, and Removing Meat Stuck in One's Teeth When Gums Might Bleed;
(Melting ice.) melting ice that is sitting on top of a drink. (E.g. on top of water, orange juice, grape juice, etc.); the difference...