Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Failed on First Use - Prong detached from unit and remained stuck in wall outlet

This product appears to be both a fire and electrocution/safety hazard. On first use one of the prongs detached from the AC adapter and remained firmly affixed inside the wall socket when user attempted to unplug unit from wall. User then had to flip the circuit-breaker to that outlet and remove the stuck prong using pliers. The seller, United Integral of San Gabriel, CA is selling what appears potentially to be a very dangerous product.