What was weird was when you poke the lava with a stick, it goes "clonk", just like hitting a normal rock. Since the lava is coming towards you, and is clearly fluid enough to move, you'd expect it to be soft. It's not - it's hard as rock and moving at the same time. The lava is this shot is definitely fluid though and it was moving faster than running pace. Our hotel manager is bit of a lava junkie and he goes equipped with welder's protective equipment and things like kitchen whisks to dunk into it!