Leo, Bar and Lukas Haas (right behind Bar there) look like they had a blast on the Xcelerator at Knott's Berry Farm earlier this week. So, so cute. It looks like Leo wanted to let loose after his big documentary premiere  and he found the perfect way! There is just something so fun about seeing celebrities having wholesome fun at amusement parks . Plus, I can't get over how cute Leo looks with a big old smile on his face!