Christians, how do you explain the failed prophecies of the Bible?

Sorry Bungee Brain, you have misinterpreted the verse completely. It has nothing whatsoever to do with His return. Read on and you will read of our Lord, with Moses and Elijah on the Mount of Transfiguration. THAT is what He was referring to. Typical, you twist a verse to fit your argument and you don't seek after truth. You'd be better off with Mad Magazine, more your speed.