As we all know, I tend to be a bit skpetical and this leads me to do some fact checking. In reading about US skelton team memeber Uhlaender, there were a number of quotes from her dad who played for the twins in the 60s. I can't find the exact quote in the AZ newspaper, but I recall him telling her not to be nervous - that he played in Yankee Stadium in his ML debut in front of 60,000 fans and his idol (Mantle) in CF.
Well, not quite. His debut was against the White Sox. Ken Berry was in CF. but to his credit, there were 27,000 fans there. and they were battling for first place (ended up winning) so I'm sure it was exciting.
As for Mantle and 60,000 fans at the toilet, well in 66 when he finally played in NY in July, Mantle was in CF (and only 17,000 fans showed up). so the nervousness in his "debut" was almost a full year after his first major league game. And the 60,000 fans, well that must have been in his imagination (or more likely in MIN when they were good). In fact he once played in the toilet in front of a mere 9,000 fans at the end of the 66 season.
And those were the only two seasons that his scenario could have happened because after 66 the Mick played first base for his last two seasons. Its funny how time makes certain memories a lot different than they actually were.