What may occur if a propane container is overfilled?

If a propane container is overfilled, a white mist can be released, which is a notable indicator of the overfilling. This mist occurs because propane exists as a liquid under pressure in the container. When the container is overfilled, excess liquid propane can escape, especially if it is venting due to increased pressure as it warms.

The escape of propane vapor, which can condense in the cooler air, leads to the formation of this visible white mist. This phenomenon serves as a critical warning sign that indicates potential hazards and the need for immediate action to avoid safety risks.

While other responses touch on potential outcomes or possible experiences during an overfill scenario, the release of a white mist is the most direct and observable consequence related to the overfilling process. The other options may suggest a range of issues but do not directly represent a common and visible sign indicative of propane overfill.