As I stated in the beginning of my review of The Naked Gun DVD, many times when I'm reviewing, I'll pull out the most memorable quote from the film I'm writing about and use it as the preface to my review.
Every line is a comedic gem.
I'd place it even higher than that. Hays carries this movie along nicely, and is able to sell so many jokes with his subtle facial expressions and gestures. Naked Gun Leslie Nielsen is at his deadpan best as a doctor onboard the ill-fated airliner. Robert Stack and Lloyd Bridges appropriately chew up the comedic scenery, and every line that comes out of Peter Graves' mouth is hilarious. Special notice must be given to Stephen Stucker as Johnny, who has no bearing on anything in the film whatsoever, but gives an insanely fun performance.