Ricardo Palmerola

Two nice guys, a wrestler (Bud Spencer) and an Ice-cream vendor (Giuliano Gemma) are mistaken for dangerous killers by an important local gangster, whose nickname is "Sorriso". With the help of many funny coincidences they play along with Sorriso "working" for him, just to survive, but, when they receive the order to butcher the components of a very indigent family they are unmasked and... (imdb)

After a jewel robbery goes horribly wrong and their leader, Jack (Naschy), is shot in the head, a band of thieves goes to a local doctor for help. To save their friend's life, the criminals devise a unique solution: kill their psychopathic worst enemy, toss his body onto a railroad track in front of an oncoming train, and use the severed head for a brain transplant! Unfortunately the unwilling donor, the Sadist, turns Jack into a raging lunatic bent on murder and destruction (Image Entertainment)