A plausible alternative, and if I could have gathered the specific color palet to identify the flame per Healyn's info, we might be a bit more certain about what actually occurred.
Was it a gas flare? Or was it a massive perfectly timed synchronous cattle fart as you suggest?
Maybe it could have been a Min min light, or was it those " little people " running around the area after sundown playing pesky tricks on those poor hard working farmers.
I guess we might know soon enough. Meanwhile it would seem that your explanation has as much merit as mine I guess?
EGO Price at posting:
44.0¢ Sentiment: Hold Disclosure: Held