They should have thrown on about four tractor tires, all the used oil everyone had, along with 10 gallons of gasoline. Let the gasoline sit for a minute or two before lighting.
It'll make one hell of a BOOM with a cool mushroom like explosion. Burning hot as hell for hours thanks to the tires.
Y'all just playing games with that. Get a few Volkswagon blocks, steal some thermite cones from the rail road maint of way shack (they use them for field welds). Put the thermite cones in the engine bocks and light them up. You get a nice white hot class D magnesium fire. Nice and clean as well. None of that stank and polution from the tires. This isn't the 70s anymore, can't be indescriminant about your polluting.