The antonyms for the phrase "getting to one's feet" are "falling," "collapsing," "toppling," "tumbling," and "stumbling." These words describe the opposite of standing up, indicating the loss of balance or the inability to support one's body weight. Falling can result from tripping or losing traction, while collapsing usually refers to a sudden loss of strength or consciousness. Toppling suggests a fall caused by external factors, such as a push or a gust of wind, and tumbling implies a series of uncontrolled falls. Stumbling is a minor fall that usually involves tripping over an obstacle, such as a curb or a pebble.