In my estimation, Fletch (1984) is one of the most underrated comedies of all time. Here you've got Chevy Chase in his smart-aleck prime as a reporter "investigating" a strange conspiracy involving a man who wants Fletch to kill him. The journey takes Fletch from the drug-riddled beaches of LA to the majestic rolling hills of Provo, Spain (er...I mean Utah).
One of my favorite parts: an undercover operation where Fletch poses as an airplane mechanic. It seems it's "all ball bearings" these days, but that's not today's quote:
"One of those manure spitters jack-knifed on the Santa Anna. God awful mess. You should see my shoes. Woo-hee!"