If something falls into defrost vents where does it go?

If something falls into defrost vents, it typically travels into the vehicle's HVAC (heating, ventilation, and air conditioning) system. Depending on the size and shape of the object, it may get lodged in the ductwork, obstructing airflow, or it might fall further into the system, potentially affecting the heater core or evaporator. In some cases, it could even end up in the cabin area, causing issues with air circulation or noise. It's advisable to have a professional inspect and remove any debris to avoid further damage.