A Jewish man took his Passover lunch to eat outside in the park. He sat down on a bench and began eating. Since Jews do not eat  leavened bread during the eight day holiday, he was eating Matzoh. A little while later a blind man came by and sat down next to him.  Feeling neighborly, the Jewish man passed a sheet of matzo to the blind man. 

The blind man handled the matzo for a few minutes, looked puzzled, and finally exclaimed, "Who wrote this crap?"

haggadah Section: -- Cup #2 & Dayenu