Tamal Krishna Goswami: Srila Prabhupada first gave Gayatri-mantra in Boston, and then in September of 1968 he came to San Francisco and gave some of us Gayatri-mantra. He taught us how to chant and gave out a sheet with the Gayatri-mantra. Jayananda found it difficult to pronounce the mantra, so he decided to ask Srila Prabhupada about the pronunciation and he took me along with him.
We sat in front of Srila Prabhupada and Prabhupada asked him to pronounce the mantra. As Jayananda tried, Prabhupada leaned back and roared with laughter. Srila Prabhupada shook his head and said, "It's hopeless. But it doesn't matter. Because you are so sincere, Krishna will accept your chanting."