The unstoppable “Jurassic Park” scoffed down $ 18 million from 17 territories last weekend and bounded to $ 107 million gross overseas.Meanwhile “Last Action Hero,” facing its first test in a major market, debuted in the U.K. and Ireland with only fair results. Counterprogrammed against “Action Hero” in the U.K. and Ireland, “Dennisthe Menace” had a subdued start, but Warner Bros. exex expect John Hughes’ film to play steadily through the long summer vacation, based on the momentum it developed elsewhere. In its third weekend, Steven Spielberg’s epic dropped 21.6% on 435 prints in the U.K. and Ireland for T21.46 million ($ 32.45 million), and 9% on 237 screens in Japan, $ 34.57 million to date. “Jurassic” had smash openings in Hong Kong, earning $ 866,563 in four days on 15 screens for a screen average of $ 57,771, and in the Philippines with $ 827, 130 in four days on 48. Thailand triumph Blockbuster also went into orbit in Thailand, earning $ 320,130 in two days at 33 theaters. After exceeding more than T1 million ($ 1.5 million) for an unprecedented 14 days straight in the U.K., the gross fell slightly below that mark Friday but rebounded Saturday and Sunday. In the first three days in the U.K. and Ireland, “Last Action Hero” collected T894,309 ($ 1.34 million) on 295 prints. “That’s fine — a bit less than we had expected,” said Jimmy Katz, Columbia TriStar U.K. managing director. OK ‘Hero’ “The figures are OK, about what we anticipated,” said a Rank Odeon circuit exhib. Exhibs say John McTiernan’s film wasn’t harmed by age restrictions, but the warm, intermittently sunny weather did affect biz, especially Sunday. It did better in provincial multiplexes and down-market areas than in upscale cinemas, indicating it’s drawing young males. One exhib said word-of-mouth wasn’t very good in London, which could mean a substantial drop next weekend. The British critics gave the Arnold Schwarzenegger vehicle a withering reception, one likening it to “Pirandello repackaged for popcorn addicts.” “Dennis” made T400,572 ($ 600,858) in three days on 262 prints — rated fair by Warner Bros. U.K. managing director Maj Britt-Kirchner. She said biz was better in Scotland, where it rained over the weekend. The film was released in the U.K. with the abbreviated title to avoid confusion with the similar but unrelated British character Dennis the Menace.