What would happen if someone ate a metal ball bearing whole?

If someone swallowed a metal ball bearing whole, it could cause serious health complications. The smooth surface might allow it to pass through the esophagus and into the stomach, but it could lead to obstructions or perforations in the gastrointestinal tract. If it doesn't pass naturally, medical intervention would be required to remove it, potentially involving endoscopy or surgery. Additionally, ingesting metal could pose risks of toxicity or infection.