From Martin Mosebach's
The Heresy of Formlessness:
There is a splendid old joke about the Jewish schoolboy who happens to find himself at a Low Mass and afterward tells his father about it. "A man came in with a little boy and gave the boy his hat. The boy took the hat and hid it. Then the man asked the congregation, "Where is my hat?" and the congregation replied, "We don't know." Then they collected money for a new hat. In the end the little boy gave the man his hat back, but they didn't return his money.