Billy Joel poked fun at himself while playing one of his monthly shows at Madison Square Garden Wednesday night. Turning to the audience during a break between songs, Joel joked that fans «may be right» if they think he has a wooden leg, before assuring the crowd that his eyes are just fine.The legendary rocker shared with the audience that while he has «a leaky eye» — the result of one of his eyes not getting enough lubrication, he does not have a glass eye, despite what he says some of them may have heard.The 73-year-old singer went on to play some of his biggest hits for the sold-out crowd, including a cover of The Beatles' «A Day in the Life,» telling concertgoers that though he hadn’t written that song, he wishes he had.Joel continued to be self-deprecating throughout the night, making light of his age while entertaining the audience.Belting out his 1983 hit «An Innocent Man,» Joel told the crowd that he wrote the song before his voice deepened with age.