THE Fantastic Four are still fantastic at the U.S. box office - the 2005 blockbuster's sequel, RISE OF THE SILVER SURFER, has stunned film experts by debuting with a $57.4 million (GBP28.7 million) opening weekend gross. The film easily stole the top spot from Ocean's Thirteen, which scored a respectable $19.1 million (GBP9.55 million) in its second weekend on release. The second Fantastic Four film even out-performed its predecessor, which grossed $56 million (GBP28 million) in its first three days two years ago. Meanwhile, comedy Knocked Up continues to surprise at the U.S. box office - it claims this week's number three spot with a healthy $14.5 million (GBP7.25 million) three-day gross, taking its three-week tally to $90.5 million (GBP45.25 million).