Jesus Walked On Water, But This Guy Walked On Lava
There are various types of lava. The specific type that this guy walked on is called “pāhoehoe” (pah-hoy-hoy).
It’s a Hawaiian word which means“on which one can walk”. Its flows have smooth looking surfaces that sometimes look like twisted braids of rope.
Dr. Robert Rothman explains that as pāhoehoe lava moves, the outer skin cools, whereas the lava underneath is more of what you’d expect: boiling dangerous hot liquid. As it flows along, the slightly more solid outer skin gets dragged along with it, which causes the twisted rope look. The slightly cooler outer rocks act as a type of insulation, stopping what would be immediate heat transfer onto the shoe.
So as long as you don’t penetrate the outer shell, the lava is somewhat safe to walk on.
Check out this ‘lava craft worker’ literally running across an active flow.