Here is another of this very aircraft prior to the NSW Govt acquisition firebombing a ridge in the US - guy goes in STEEP, pushing over at the crest of the ridge before dropping the retardant. Definitely 0 g ~ negative g moment
https://www.youtube.com/watch?v=7QJTZXl_5BE
The NSW Govt BAe 146 tanker and the C-130 tanker were both in at Canberra today refilling.