Director John McTiernan serves up a straight-down-the-middle sentimental actioner and pleases no one in the summer flop Last Action Hero (C-) in which a young movie fan enters the screen, reverse Purple Rose of Cairo style, to pal around with Arnold Swarzenegger on some lame product placement laden adventures. A muddled tone, an uncertain target audience, flat action sequences, poor special effects and an absolute void of dramatic structure and human chemistry are but some of the hazards in the way between the movie and your entertainment. There are two pretty thrilling stunt sequences, but it’s hard to stay too thrilled when the cloying duo of protagonists is mugging and plugging.