Salute!
Best one I saw was the gyro thing that was your ejection seat!
https://en.wikipedia.org/wiki/Kaman_KSA-100_SAVER
and......:
https://www.popularmechanics.com/mil...-seat-history/
Seems there might also have been an unpowered version that was still better than coming straight down in a village of angry farmers as one of my classmates did near Hanoi.
OTOH, a small gyro might be useful as a FAC vehicle that could be airdopped.
Gum sends...