The strange blast was caught on tape and aired live during Robinson's report. At first, news station employees thought the explosion was a transformer. But when FOX 10 checked with local utility providers APS and Salt River Project, they were told no transformers had blown in the area.
It really looks like a shell exploded but you figure there would be all sorts of outcry if that happened. When I first saw it at full speed I kind of thought it looked like the sci-fi interpretation of faster than light travel. Kind of what the Enterprise does in Star Trek. Here is the video so you can see for yourself: