Grab and Go
Well if you manage to put such a device in service ..... the drone that autonomously grabs the casualty in a device like those fluffy toy slot machines ... let me know and I will self isolate forever.... my experience of those manually guided grab slot machine is that they do not work! So there you are with your broken leg on the hillside - after your 500 foot fall - when without a by your leave this 'thing' grabs you by the scruff of the neck and drags you down the remaining 3,000 feet!
Bring it on!