Gurizada Fandangueira Pyro Technician in Action?

In my post yesterday about the apparently pyrotechnics-caused tragedy at the Kiss nightclub in Brazil, where more than two hundred people died, I posted the video below of the band Gurizada Fandangueira shooting pyro at a different show.  Today, watching the video full screen, I noticed what appears to be the pyro technician pouring water on the spent pyro charges, and then striking the cable and the pyro setup.  Take a look, starting at  about 00:14 when the pyro runs out.

According to Billboard, the band was "known for pyrotechnics".