Shamelessly stolen from a comment on Hirhurim by someone called Fotheringay-phipps:
They say a story about the head of the local apikorsim who was dying. And as he lay there on his deathbed, with his apikorus talmidim gathered around him, he told them “call the rov – I want to do t’shuva“. So they told him “how could you do this? All these years you’ve been teaching us k’fira, and now you want to do t’shuva?” And he responded “Aderaba! Ich vil vaisen az dos vos shtait in Gemera ‘risho’im afilu al pischan shel gihenim ainam chozrim‘ – dos is oich falsh!“