A well-known exemplum tells of a preacher whose congregation is falling asleep during the sermon. Then the preacher starts telling a thrilling, but hardly edifying story. When the congregation wakes up and listens attentively, the preacher reproaches them for paying more attention to wordly affairs than to their salvation. The article presents a variant telling of Johannes Lassenius, a Lutheran pastor at the German church in Copenhagen, who is said to have woken his congregation by juggling with his handkerchief in the pulpit. Both Lassenius' possible sources and the later transmission of the story about his juggling are discussed.