The Eyjafjallajökull eruption.
The excursion caused quite a controversy at the time. Many thought that the crew and their Icelandic tour guides were not being cautious enough, venturing extremely close to the site of the eruption.
A specially equipped SUV was, for example, taken for a spin in the fresh, scorching hot lava, causing one of its tires to catch fire. However, all went well in the end.
Click here to watch the Top Gear video on Youtube.
Click here to access Top Gear’s web site.