Khrushchev probably had 100% of his marbles when he did that. Even the Soviets thought that he was a bit “unpolished”; not surprising, given that he attended school for about four years in total. He got where he got with his own wits.
Khrushchev,being part of Stalins “inner circle”,
I have often wondered if he saw Stalin use the shoe for dramatic effect.
“When Stalin says dance, a wise man dances.”
Nikita Khrushchev