In the scene where George hits the tree and falls on a branch with green stuff on it, you can catch a glimpse of his briefs.
Brendan Fraser auditioned for the role, but wasn't going to get it. However, he'd brought his dog along to the audition and it was behind the sofa. When it started barking at the end of the audition, Brendan leaped over the sofa and started barking back at it on his hands and knees. They offered him the part immediately.