Final answer:
When performing abdominal thrusts on a choking victim, grab your fist with your other hand and thrust inward and upward into their abdomen until the object is expelled.
Step-by-step explanation:
When performing abdominal thrusts (Heimlich Maneuver) on a choking victim, you should grasp your fist with your other hand and thrust inward and upward into the victim's abdomen. This action exerts pressure on the diaphragm, forcing air out of the lungs and expelling the object lodged in the airway. It is important to give one full thrust and continue until the object is expelled, as stopping too soon may cause the object to be lodged further.
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