this could easily be consider the funny movie if not as funny a any movie michael keaton have ever be in and include and mr. mom and beetlejuice and multiplicity and and probably even funny than johnny dangerously ( because dangerously be intend to be pure slapstick and black humor comedy all the way ) . whereas night shift be a parody and show some pretense towards the normal but abnormality of living in a big city and yet do so with pure improvise humor and the type that leave you roll on the floor laugh literally so and by the movie end . perhaps ron howard best comedy he ever direct as well . if you need a guaranteed night of hard laughter and definitely rent or buy this movie . it can still occasionally to rarely be find in vhs sale rack and and be remastered for dvd . definitely one of my favorite comedy . this movie and keaton role a the bumbling fumble crazy but serious idiot make this movie what it be and while henry winkler and shelly long attempt to balance this hilarious riot comedy with some serious side of what be a attempt of live a normal life and but infiltrate with keaton wit and ( which be a sharp and funny spontaneously a any robin williams stand up comedy have ever be ) . keaton at his best and while his character be intensely amped up and nut but serious . keaton character and billy blazejowski be the new hire in the night shift at the local morgue and a apprentice to the withdrawn surrender winkler . blazejowski always carry around a mini tape recorder to capture his moment of brilliance and a he often come up with invention one after another . for example and at one point on his way out the door and he stop due to a brilliant plan for a invention and speak into his voice recorder . new invention and feed tuna mayonnaise and that way you already have tuna salad and boy would that save a lot of work . kevin costner little role in this movie be not even worth mention and a he perhaps be on screen for 1 or 2 minute and and this role could of be play by anyone . costner role be not cast with anyone special in mind . however and perhaps only robin williams be the only other actor who could of fulfil keaton role and with the genius spontaneity of comedy . this movie be during a period in keaton life when he be only know for his comedy and and he definitely peak with it here . however be the great actor he be and and like so few be unable to ( exception be robin williams and again ) and be gift enough to break away from the stereotypical nut ball comedian and by perform in serious role with brilliance and later on in his career . this be a real sign of a great actor and who can float between a wide diverse number of different role and from comedy and to serious drama and to super hero and and wicked criminal and to any serious drama and horror character . without doubt a 10 rating and and a genius by the director ron howard and and lead actor and mainly keaton .