Hollywood may not be well represented among the films showing in competition at the Cannes Film Festival this year, but its PR efforts are on almost daily display, with some stunts drawing crowds so large that they have halted traffic on the Croisette and even stalled it on roads leading to the festival. Last week, Disney/Pixar caused a sensation with a giant replica of the balloon blimp that figures prominently in the upcoming animated feature Up . Disney was at it again on Monday as Jim Carrey, who plays Scrooge in the studio's A Christmas Carol, set for release in November, rolled out of the Carlton hotel in a horse-drawn carriage through a man-made snow storm. .