It was amazing. It was the most amazing experience I have ever had with Srila Prabhupada. But I couldn't appreciate it, and the next thing that happened shows that I didn't appreciate it. The next day, which was the last time I saw Prabhupada, Tamal Krishna Maharaj wanted me to experience what Prabhupada's mood was when he heard the reports. Sometimes Prabhupada went into a trance when he heard how the books were going out. But the day before, Prabhupada had embraced me and had told me that my life was successful, and five devotees were in the room. I became puffed up. I was feeling cocky. So when I started reading about how the books had gone out in Eastern Europe, how this professor had taken, how this library had accepted, this museum had accepted, at one point Prabhupada stopped me. He said, "It is by Krishna's mercy." Very piercingly he was chastising me because I was feeling proud of what I had received. This was the very last time I saw Prabhupada and the last words that he ever said to me. I realized that we must always remind ourselves that anything we are able to do is by the mercy of guru and Krishna. The best time I had with Prabhupada, the most amazing experience, was the day before, and the most devastating experience was the day after, the last experience, and it was serious chastisement.
Reference:Memories Anecdotes of a Modern Day Saint - Volume 2 by Siddhanta Dasa