Elizabeth Smart posted an emotional message after placing at the bottom of a bodybuilding competition. The activist took to Instagram Saturday to share that she had “such a blast” competing in the North American Championships in Pittsburgh — despite losing. “Another show for the books! Had such a blast,” she wrote alongside a video of herself rocking a metallic blue bikini in the competition. “I’ve always said ‘just stepping on stage is a win for me!’ And I completely stand by that. I competed in two classes: ‘Masters 35+,’ which requires you to be 35 or older, and ‘Open Class D,’ which is height-based. I placed at the bottom of both…