"Master of Sparks" is based on a true story from ZZ Top guitarist Billy Gibbons
' youth in Houston. He and some pals welded together a steel-caged ball that they attached to the back of a truck. One of them would climb inside and then the truck would drive off, reaching a speed of 60 miles per hour (97 km/h). The person in the cage would be dragged down the highway immersed in the light of flickering friction. Those who survived got the title of Master of Sparks - one of them was Billy Gibbons.