It's hard for Eddie Lacy to get through a five-minute session with reporters without breaking out in laughter. After Thursday's practice, it happened on multiple occasions. The junior running back has been noticeably loose throughout the preseason. He's coming back from a serious toe injury, which forced him to miss the entire spring, and he's assuming a role previously occupied by Heisman trophy winner Mark Ingram and Heisman trophy finalist Trent Richardson, but the stress doesn't seem to be bothering him.