Toast usually lands on the floor butter-side-down. This is because of how it is dropped from a table. As the toast falls from the table, it rotates or turns. Using the average speed of rotation for a slice of toast as it falls from the table and the usual height of a table, a slice of toast that began butter-side-up on the table will land butter-side-down on the floor 81% of the time. This is because the buttered side is heavier. When an object has a heavy and light side, in most cases it will fall heavy side first.