Chengdu Research Base of Giant Panda Breeding/Reuters March 10, 2013. A female giant panda, Ke Lin, watches a panda mating video at Chengdu Research Base of Giant Panda Breeding, Sichuan province.

TIME’s “Most Surprising Photos of 2013” gallery has 129 photographs of some of the most awesome, bizarre, shocking and just plain weird photographs taken in 2013 and chosen by our photo editors. But this picture may very well take the cake (which cake, we don’t know).

Distributed by the Chengdu Research Base of Giant Panda Breeding in China, the photograph shows Ke Lin, a 5-year-old female giant panda, leisurely watching a panda mating video. Why? Because she kept fitfully rejecting her mate, described as ‘clueless and unenthusiastic’.

Researchers moved a TV next to her enclosure and began looping footage of pandas mating in the wild. “So we played them the film and she took great interest in it. After that there was no stopping her and they mated successfully,” a spokesman told The Independent.

See more of the Most Surprising Photos of the Year on LightBox.