Downey, 44, and Law, 36, jazzed up the dialogue on the spot, with an assist from director/writer Guy Ritchie, the artist formerly known as Madonna's husband and a specialist in nimbly paced gangster capers (1998's Lock, Stock and Two Smoking Barrels, 2000's Snatch, last year's RocknRolla) that rely heavily upon male interaction and relentless cursing.
The language has been tamed for this PG-13 outing. But manly bonding between bohemian Holmes and bourgeois Watson is at the core of the story. Trendy types might even describe it as a "bromance," especially when Downey's detective bristles at the very thought of his friend's nuptials coming between them. But the relationship takes its cues from a long line of what used to be known simply as buddy films.