Thornton — A licensed practical nurse driving down Highway 20 found her medical skills come in handy as she tended to an injured trucker whose semi rolled on Tuesday. As St. Anthony’s Jennifer Zeh headed to registered nursing classes at the Idaho Falls-based Eastern Idaho Technical College, she witnessed cars suddenly braking and potatoes launching skyward. As the dust settled, Zeh saw a semi turned on its side and thousands of spuds strewn across the highway and the adjoining median.