Janananda Dasa: Amogha was pouring water into an inverted goblet thinking it was the front. However, it was the base. Srila Prabhupada observed it and asked him as to what he was doing. Amogha realized his mistake and everybody came to help him out.
Srila Prabhupada was talking about 'Misused Intelligence' at that time. Looking at the devotees gathered there, he said "Misused Intelligence" and everyone had a hearty laugh.