Audio/video fuori sincrono: When young Ignacio is singing to Father Manolo as a birthday present his lips move a little before we hear the lyrics
Anacronismi: Manuel Berenguer claims giving a Walkman to Juan as a gift. According to the plot, this was before Ignacio's death in 1977. The Walkman was introduced to the market in 1979.
Anacronismi: When Burenguer declines Ignacio's story over the phone, he says that he wouldn't be accepting it for "Short Stories of the 80's". According to his story, it would have had to been at least 1977, three years before the '80s let alone before a compilation of stories from the '80s would be released.
Revealing mistakes: Towards the end of the movie during the scene in Ignacio's apartment, there's a close up on his chest. You can clearly see the makeup where the prosthetic chest ends and his neck begins.