Compressor Stall, I operated around Arnhem Land for a couple of years and can't say I witnessed this myself, but definitely interesting and makes a lot of sense now! Cheers!
Kites were always a bloody big hazard, as you said, not quite smart enough to get out of the way properly!! Had more than a few White Bellied Sea Eagles get uncomfortably close as well, they would have made for a pretty bad mess, both of the aircraft and my underwear.