Congratulations to Enrico for his amazing catch! (see post below)
The colour image of the same sprite shows very interesting things. As luck would have it, the sprite occurred exactly at the time when two video fields switch, so the beginning is recorded in the top field and the end in the bottom field. The streamers were still going down and only luminous at their tips, something that is normally only noticed using high-speed video cameras.
Below are the blue and red pixels (the green contain almost only noise). For the eye there seem to be only small differences between the two, the red channel perhaps looks more diffuse.