A strong storm brought Force 12 (hurricane-strength) gusts of wind to the port of Antwerp over the weekend. Watch as they topple a stack of 40-foot shipping containers.
Clearly, the container that fell into the harbor was empty, or at least very lightly loaded (otherwise it wouldn't have been floating so high out of the water). Even so, an empty 40' container weighs more than 8,000 pounds (four US tons); yet it was tossed around as if it were so much scrap paper. Definitely a strong gust of wind!