Sleipnir spear, which may be a valkyrie, and a female figure greets the rider with a cup. The scene has been interpreted as a rider arriving at the world of the dead. The mid-7th century Eggja stone bearing the Odinic name "haras" (Old Norse 'army god') may be interpreted as depicting Sleipnir. John Lindow theorizes that Sleipnir's "connection to the world of the dead grants a special poignancy to one of the kennings in which Sleipnir turns up as a horse word," referring to the skald Úlfr Uggason's usage of "sea-Sleipnir" in his "Húsdrápa", which describes the funeral of Baldr. Lindow
Legged Squad Support System was approximately the shape and size of a horse. A stereo vision system, consisting of a pair of stereo cameras mounted into the 'head' of the robot, was integrated alongside a light detecting and ranging (LIDAR) component in order to enable it to follow a human lead and record intelligence gathered through its camera. The initial contract for the Legged Squad Support System was awarded to Boston Dynamics on December 3, 2009. The continued evolution of the BigDog led to the development of the LS3, also known as AlphaDog. The contract schedule called for an operational demonstration of two units