Looked like a really big shoe... (thanks ed)
Hillary's right arm is bent, hand behind her. As she is moved from resting against the bollard toward the van, she does not move her hand or arm, it stays bent in exactly the same position. People always move their hands and arms when starting to walk, unless they are doing some act where they control their arms for some visual/dance purpose. She's out of it while propped on that bollard.