Billy Crystal's ad-libs in 'The Princess Bride' were so funny Rob Reiner had to leave set

Billy Crystal's ad-libs in 'The Princess Bride' were so funny Rob Reiner had to leave set

It's often said that comedy is harder than drama, and while that may be debatable, there's no doubt that good comedians are a unique breed. Comedic actors know how to deliver lines in just the right way with just the right timing to make an audience laugh, but true comedians are often funnier when they’re allowed to go off-script and let their gift for spontaneous humor shine.Enter Billy Crystal, whose ad-libbed scene in “The Princess Bride” was…