It's hard to imagine the scene from 1964 now - someone barely having a clue who The Beatles were, or the man who would become Muhammad Ali.
But that's how things were when US journalist Robert Lipsyte found himself face to face with these future legends more than 50 years ago, through a chance of publicity matchmaking.
The New York Times plucked Robert from the feature department to head for Miami Beach to cover the heavyweight boxing title fight between champ Sonny Liston and the upstart Cassius Clay, who would later change his name to Ali.
He barely knew who Cassius was, and even less about the mop-top haired singers from Liverpool who happened to show up during his visit. "I wasn't a teenage girl," Robert said. "I really didn't know who the Beatles were or what they would become."
A few days earlier they appeared for the first time on American television's massively popular Ed Sullivan Show, having enjoyed their first US number one single I Want To Hold Your Hand.
Now they were being led up a stairway in the gym where Cassius trained, with an unwitting Robert swept along.
"They're little guys with lots of hair and all wearing white terrycloth cabana jackets," he said. "They were yelling and cursing because they had just been told Cassius wasn't there yet, and they wanted to leave. But these big security types just kind of herded them up the stairs."
Writer Robert found himself in a dressing room with The Beatles, who were not at all happy. They had gone earlier to Sonny Liston's training, but the boxer took one look at them and refused to pose for pictures.
Robert introduced himself and asked for their prediction, which was for a first-round Sonny Liston knockout. Then they all waited for 10 or 15 minutes, with The Beatles complaining the whole time, for Cassius to arrive.
"But suddenly the door burst open and there he is. He's the most gorgeous creature I've ever seen. He kind of glows and he's laughing, and he says, 'Come on, Beatles, let's go make some money'."
Make some money they did. In photos that would become legendary, Cassius is shown knocking The Beatles down like dominoes, and standing over them sprawled out in the ring.
It was as if they had all rehearsed it beforehand. "There was a lot of laughter, and then they're gone, off to their limo," Robert said. "Cassius then started training in front of people who paid 50 cents to get in."
After the workout, Cassius went back to the dressing room for a rubdown, and Robert crowded in with him. Cassius recognised him as being in the room earlier, and beckoned him over with a question. "Who were those little sissies?" he asked.
Cassius, of course, would beat Sonny Liston and go on to even greater things as Muhammad Ali. Robert would become a columnist for the Times and cover him for years.
And The Beatles? They ended up doing OK, too.