Knock KnockWho’s there?Opera!Opera who?Opera-tunity, and Posted on September 22, 2018September 22, 2008 by admin Knock KnockWho’s there?Opera!Opera who?Opera-tunity, and you thought opportunity only knocked once! Spread the love Related posts: Knock KnockWho’s there?Gerald!Gerald who!Gerald washed Knock Knock 80 Knock KnockWho’s there?Acid!Acid who?Acid down Knock KnockWho’s there?Stu!Stu who?Stu late