What's the worst dinosaur film ever made?

Gosh, there are so many possibilities. Here Smithsonian dino-blogger Brian Switek nominates the 1970s TV movie "The Last Dinosaur" in which idiocy is piled on impossibility. Who knew that a geologist was capable of referring to a mammal as a "ceratopsian," (it's a horned dinosaur - where did you get your degree, anyway?) or that T. rex had a foam-rubber skull that could make a giant rock bounce harmlessly away?