This 12-second YouTube clip shows part of a safety video that was created in the early 1990s for airport maintenance crews. In a demonstration, a United Airlines plane on a tarmac flips an airport truck into the water with a blast from its engine.
Now, that's an engine:
UPDATE: 3 p.m. This post originally said that the "United Airlines Boeing 747" was "idling on a tarmac." But, one of the commenters below believes that the plane was misidentified on YouTube and that it was a 757 instead, plus the engine must have been roaring at full blast. Other colleagues have said they doubt the video is real at all. Feel free to weigh in with your own views.