If you succeed in tipping a cow only partway, such that only one of its feet is still on the ground, you have created lean beef. Such a feat is well done. Naturally, being outside, the cow is unstable. When it falls over, it becomes ground beef.

The Coalition to Prevent Gratuitous Misuse (CPGM) was organized in 1901 to protest the (then) common misuse of the word weight to mean mass. The movement gained momentum (defined as the vector product of its velocity and mass) when SI was officially adopted in place of metric system, which no longer carried its weight. This movement captured the imagination of the mass of scientists througout the world, although the general public remained unmoved, since a body at rest tends to remain at rest (see Newton's Laws).

~from https://en.wikipedia.org/wiki/Wikipedia:Best_of_BJAODN