Seizure-like movements can include jerking motions, uncontrolled muscle spasms, or convulsions, indicating a severe neurological response to opioid toxicity. Conversely, a rigid body presents as stiffness or rigidity in the muscles, making movement difficult or nearly impossible. Both of these symptoms signify a critical need for immediate medical attention and the potential administration of naloxone to reverse the effects of opioid overdose. Recognizing these signs promptly can be crucial in providing timely and effective intervention to save a person's life.