How delicious, in this era of franchise bloat and less-than-simple sequels, to be handed a second helping that leaves you sated rather than queasy. If Paul Feig's Another Simple Favor is a cocktail, it's one shaken with a confidence, a dash of vermouth and a twist of lemon, sipped poolside in Capri while the bodies float by (sometimes literally, sometimes, more enjoyably, in spirit). Rarely does a film invite the audience to marvel at its gorgeous surface and still let them dive, giggling, into its undertow. Here, we have that rare, effervescent tonic: a thriller that dresses up as a comedy, or the other way 'round; a parade of “thrills” that remembers to be, above all, fun.