Which of the following methods is NOT a way to be exposed to contamination at a crime scene?

Standing still does not involve any interaction with contaminants in the environment, making it distinct from the other methods listed. Skin contact, ingestion, and injection all entail direct involvement with substances that could lead to contamination. For example, skin contact with hazardous materials can result in the transfer of those substances onto the skin, potentially leading to absorption. Ingestion refers to accidentally consuming contaminants, which can happen if hands are not properly decontaminated before eating or drinking. Injection usually implies the introduction of a substance into the body through a needle or a sharp object, which poses a direct risk of contamination. Therefore, standing still is not a method of exposure to contamination at a crime scene, as it does not inherently involve coming into contact with harmful substances.