go for it , I wouldn't worry about sample clearance ... unless you're a big name , nothing's gonna happen to you (copyright holder is NOT gonna make any $$$ suing an underground artist)
indeed ! I guess he wanted to prove he could adapt to different movie roles a la Tom Hanks , but when you think about it 50 is 5'11 and now weighs 160 pounds , that's a BMI (body mass index) of 22 which is perfect.