Amazon was granted a patent for the use of frantic hand-waving as a way to control delivery drones.
Here's an excerpt from the actual patent:
"The management system may be configured to receive human gestures via the sensor device and, in response, instruct the propulsion device to affect an adjustment to the behavior of the unmanned aerial vehicle. Human gestures may include visible gestures, audible gestures, and other gestures capable of recognition by the unmanned vehicle.”
The application was filed in 2016, but awarded this week.
The idea, as I understand it, is that as an Amazon delivery drone hovers over your house with the AA batteries you ordered, you can control where it lands by running out on the lawn, waving your arms and shouting, "land here!, land here!"