With Halloween falling on a Friday this year, you’d think those savvy Hollywood moguls would have lined up the scary movies in order to capitalize. But unless your idea of terror is Seth Rogen humping Elizabeth Banks (and it may well be), that didn’t happen. Consquently, High School Musical 3: Senior Year retained its hold on the top spot, adding $15 million to its total haul of $61.8 million. This means we can look forward to either College Musical or High School Musical 4: We All Flunked! Zack and Miri Make a Porno took second place with $10.7 million, while the one horror holdover from last week, Saw V, finished third with $10.1 million. Guy Ritchie’s RocknRolla failed to rock, taking in a dismal $1.8 million in its first weekend of wide release.

We doubted it would ever happen, but shooting has started on the sequel to Boondock Saints in Toronto. “Sean Patrick Flanery and Norman Reedus are reprising their roles as the crusading fraternal twins Connor and Murphy MacManus, who seek revenge on the tough Boston underworld. Billy Connolly is also returning as Poppa M,” per The Hollywood Reporter. And yes, enfant really, really terrible Troy Duffy is back in the director’s chair. Overnight II, anyone?

And from the “get that man a urine test” file, Joaquin Phoenix has announced his retirement from acting. Per Variety, “The words ‘Good Bye’ were penned on the actor's knuckles at a premiere Saturday night for his latest film, Two Lovers, and Phoenix confirmed a surprise announcement he made last week: He's giving up movies.” Phoenix will now concentrate on his music career. I’ve got summer 2011 in the Screengrab comeback pool.

Related:
Screengrab Review: "Zack and Miri Make a Porno"
Vanishing Act: Troy Duffy