Ignited gunpowder art - GIF

[Karl_H]

What happens next?
Is this a one and done art exhibit akin to a huge domino run or does the residue make a permanent image?

[NeiljohnUK]

What happens next?
Is this a one and done art exhibit akin to a huge domino run or does the residue make a permanent image?

Similar to pyrography or laser burning where the wood fibre's are carbonised I suspect.

Looks like a pretty slow burning extruded grain nitro rifle powder.