Not realy convincing given the lack of detail on the image , r.e somthing morphing it's height
It appears to be 2 individuals on the crest of a hill , one leans toward the other it appears that someone has been helped up on to there stilts ,
actualy reasonbly common for people to be interested in circus skills nowadays allover the world.
Take a look at this guy on stilts then imagine him only in silhouette on a hill hundreds of meters away.
youtu.be...
Sounds like a possible wind up aswell. "best alien wind-up vid"
youtu.be...