Thanks Tom...Great video! Spark-Tacular!
The static charges build as the materials are being moved and thrusted, the same for rubbing of the feet on carpet as we move around, then Pop! It discharges!
Transferring materials even liquids from a tank to tanker truck need to have proper bonding to minimize the build up. This was especially needed to prevent fires when handling flammable materials. It has caused many ignitions in dust explosions in grain elevators, sugar mills, flour, sawdust where the airborne materials combust explosively!