Though the movie is perhaps 15 minutes too long for its own good, it wouldn’t be easy to cut: every joke discreetly planted early pays off later in the movie. The inventiveness of the script and Wright’s well-judged comic timing makes the lazy, hit-or-miss “Blades of Glory” look sloppy indeed. From big roles to bit parts, “Hot Fuzz” is stocked with such formidable British firepower as Timothy Dalton, Martin Freeman, Bill Nighy, Paddy Considine and Jim Broadbent, each capable of wresting chuckles where no one else could find them. Summer hasn’t arrived, but the funniest riff on a summer movie genre has already landed.