Methods for launching and landing an unmanned aerial vehicle

An aerial vehicle, comprising:

• one or more processors configured to control to decelerate, in response to at least two of a plurality of conditions being satisfied, the aerial vehicle to cause the aerial vehicle to land autonomously, the plurality of conditions including:
• determining that an external signal related to a human is detected via one or more sensors;
• determining that a location/orientation change of the aerial vehicle is detected while the aerial vehicle is airborne;
• and
• determining that an external contact from an external object is exerted upon the aerial vehicle, the external object being an object that is not part of the aerial vehicle.

An aerial vehicle, comprising:

• one or more processors configured to, in response to detecting, by one or more sensors, an external signal related to a human or a change of a location/orientation of the aerial vehicle caused by the human holding and moving the aerial vehicle:
• control the aerial vehicle to land on a hand of the human;
• or
• control the aerial vehicle to generate a lift and/or thrust, to launch from the hand of the human.