I have actually watched a service drop short out and burn on the ground, and it was nothing like the video, well it kind of a funny story.
I got a call while I was on a service call, to stop by a house having a new roof put on and they needed me to disconnect the drop and remove the weather head and attachment point so they could replace the plywood and flashing around the riser.
Running a little late I got there and they had gotten a little rambunctious and one of the roofers was sitting with his legs off the roof, and he just cut around the riser and him self about 12" away, the problem was he was sitting on the board still around the riser, I walked around the corner just to see him make the last cut, and with nothing left to hold up the riser or drop it and him went for a ride, sparks flew, he landed on his shoulder which he broke, and the riser landed about 3' away, since the service conductors shorted, there was a loud hum then smoke and a few flashes as the wire burned away, but nothing like in the video, it eventually extinguished itself once the burning got to a point the wires fell apart, but then a thought of this hit me, instead of him on a roof but in a tree, and cutting the branch he was sitting on next to the tree trunk, I had the hardest time of not cracking up laughing.