 There are also multiple references to the scenes in Evil Dead II and  Army of Darkness (i.e. where Ash replaces his severed hand with a  chainsaw and dismembers Evil Ash respectively), where quick edits  focusing on important objects (i.e. the chainsaw, the chains, etc.)  are used in order to speed up and intensify the actions taking  place. In the film these edits are seen when Shaun makes breakfast,  whenever he uses the toilet, etc.