Actually, Damnation Alley featured both the armor-plated cockroaches mentioned by Carl Zog and the giant scorpions mentioned by Lhorgrim. (I remember some of the characters in the movie riding motorcycles on the beach by the giant scorpions.) I always liked Damnation Alley; based on a story by Roger Zelazny, it's also one of the few movies featuring a missileer in a positive role. (At least one of the main characters in the movie was a missileer.) Pilots get Top Gun, while those of us in the ICBM world get Damnation Alley. Oh well, it's a good thing I didn't become a missileer for the glory. 
Johnathan

Johnathan