The knife slashes forward. The first strike comes at forty seconds after the shower has been turned on. Over the course of the next twenty seconds there are twenty-eight cuts as the attacker continues to slash at Marion. There are no shots of the knife penetrating skin, there are no shots of open knife wounds, and, finally, there are no shots of blood spurting. Hitchcock manages to make twenty-eight cuts without once showing either a fatal blow or a fatal wound.