[zek157]

1st person gets burned shame on the event organizers. 2nd- 30th, wtf is wrong with people?

They probably used river rock, or another equally dense rock materiel that holds/transfers heat better than lighter volcanic rock.

[Colinsky]

1st person gets burned shame on the event organizers. 2nd- 30th, wtf is wrong with people?

The article says that 7,000 people walked across the coals, so 99.6% of them got through it okay.