A tanker truck is a big rig truck with a tanker attached to the back of it, usually carrying fuel, chemicals, or waste. A wreck or turnover involving a tanker truck can cause catastrophic damage to the vehicles involved, the environment, and any persons around it. They also have a higher risk of turnovers than your normal big rig. In this video, a tanker truck has flipped over to it side, but luckily did not spill any of the liquid inside. The emergency recover team safely transfers the contents of the tanker into a different tanker before a heavy duty tow truck comes and lifts it back on its wheels.