A supposed Shoe-pounding incident is highly debated if it ever occurred.
The head of the U.S.S.R. was accused of pounding his shoe on a desk to make himself louder. It likely did not happen.
October 12, 1960
However, the moderator did break his gavel when closing the debates for the day.
This happened THREE WEEKS before the Nixon-Kennedy Election and was seen to help Nixon in the long run.