A photo of beef tacos posted to social media by a diner at a restaurant has some wondering if it was teeth. Facebook user Courtney Aguilar posted the photo after ordering barbacoa tacos at the popular Pflugerville eater El Rincon. "When you order Barbacoa tacos but get teeth instead," Aguilar wrote in the post, which has since been made private. The photo of strange, feathery teeth like structures on a plate of stewed beef had gone viral. The restaurant issued a response on Facebook.