What’s more frightening than an explosion of molten hot lava? An explosion of molten hot lava whipped into the air by a tornado.

For weeks now, the Holuhraun lava field in Iceland has put on a show as the Bardarbunga volcano began erupting on August 29. Since then, photos of oozing lava and geysers of molten rock have wowed both scientists and curious spectators. However, this is likely the most interesting video to come from the lava field.

Some of the scientists studying the eruption in Holuhraun have made use of a special infrared camera, capable of detecting volcanic ash and debris in the air that is otherwise unseen by the naked eye. The main purpose of the cameras is to monitor the spread of volcanic ash through the air, which is incredibly dangerous for air craft.

The lava twister is similar in nature to a dust devil. Hot air at the ground rises rapidly, and an area of low pressure is formed. If conditions are right, the rising column of air begins to rotate. The intensity of the dust devil can increase as it stretches taller into the air.

Some dust devils can reach wind speeds comparable to weak tornadoes, though their formation is entirely different. While dust devils originate at the surface, tornadoes need a parent supercell thunderstorm above in order to form. Tornadoes are “top-down,” while dust devils are “bottom-up.”

The spinning column of lava-hot air in this video was likely formed by the same “bottom-up” process as a dust devil.  “On September 3rd, we noticed an interesting feature, similar to a dust devil but most likely composed of volcanic gases and ash particles,” said the creators of the infrared cameras, Nicarnica Aviation.

As the lava twister forms, you can see it kick up “debris” at the surface — in this case, the debris are molten hot rocks. The intensity of the twister is also apparent, which you can see when reds and oranges, representing the particles with the hottest temperatures, surge high into the funnel.

Interestingly, this phenomenon has a closer relative than the dust devil. “Fire tornadoes” have been documented in particularly hot wildfires, and are both incredible to witness, and incredibly dangerous for firefighters on the ground.

In May, the “Highway Fire” San Diego County, Calif., generated a terrifying fire tornado that ripped through headlines and social media.