He has periods of unresponsiveness, suffers from seizures, a wound on his right foot worsens, he becomes gaunter, his eyes and tongue swell, his fingernails and teeth yellow, and he begins expelling a black fluid from his ears, mouth, and anus.
After Bruce goes outside to cool off and gets into an argument with his mother in the yard, Brad (who has just killed and ate the family dog, Fulci) wheels into the kitchen, stands up and attacks Gavyn.
As soon as Ashley and Karmen leave, Brad springs to life, rips Bruce's lower jaw off, and clumsily stumbles after his mother and sister, emitting animalistic noises.
[1] The exploitation film database The Worldwide Celluloid Massacre described Sella Turcica as "pretty good horror" with an interesting storyline, passable acting, and impactful gore scenes.
[3] The film was called "rotten" and "dead" by Soiled Sinema, which criticized the acting and felt the only worthwhile element of the "dreary production" was the ending massacre.