When Led Zeppelin's mighty Robert Plant went back to his Black Country roots with folk-rock combo Priory of Brion, playing such small venues as the Queen Mary Ballroom at Dudley Zoo, his manager joked that he couldn't come and watch because "it's like Arkle pulling a milk float or watching Sebastian Coe run to the chip shop!''
Or Craig Bellamy playing in the Championship.
A big noise in the Premier League, Bellamy will be deafening in the second tier. Good players and decent teams lurk downstairs but Bellamy's arrival is astonishing, a box office star in repertory with a touch of pantomime thrown in.
Reminding the elite they are not the only show in town, Bellamy's presence is not just uplifting for Cardiff but for the whole Championship.
There must be concerns about how the one-year loan deal is being financed, particularly as Bellamy admitted he was not taking a cut in his £95,000 a week salary and Manchester City are not believed to be underwriting much of it. Cardiff City's Malay owners risk 'chasing the dream' headlines.
If playing well and free from injury, Bellamy's huge wage packet should not stir too much envy in the dressing room. He would be wise to acquire some diplomatic skills, particularly if out and about in Cardiff. Bellamy's a target.
Yet Bellamy is far brighter than his "nutter with the putter" track record would indicate.
If he gets his home-town club promoted it will be one of the most romantic stories of the season, a Local Hero with a suspect knee, short fuse and burning hunger.
Bellamy stirs up so much controversy that certain realities have been lost amidst the cordite-streaked debate over the past few days. Bellamy had to leave Eastlands.
The argument that Manchester City need Bellamy's one-man adrenalin-rush impact is correct but irrelevant.
Once Roberto Mancini decreed he wanted to rebuild without Bellamy there was no way such an immense character could stay and fidget on the bench. Mancini wants to reduce distractions and noises off.
City will miss Bellamy, a fact confirmed by their refusal to allow him to join a rival. He's still rated dangerous. But Mancini is in charge and he must be allowed to shape the team and squad his way.
A famous neighbour lobbed a barb over the fence on Tuesday, Sir Alex Ferguson berating the "kamikaze spending'' of some clubs. Yet Mancini and Brian Marwood have largely bought young, and Jérôme Boateng, Aleksandr Kolarov and James Milner are surefire winners with re-sale value.
The principle of evolution, rather than Kaka-chasing revolution, seems to permeate Eastlands.
Provided the team blends soon, Mancini will have emerged from the Bellamy saga with his reputation enhanced. He has removed a potential trouble-maker and ensured City's rivals haven't benefited.
Now he just needs to bring some creativity to midfield, preferably with Milner used centrally and a ball-winner excised, and get on with the season.
There would be balance and pace in a City XI of Hart; Boateng, K Toure, Kompany, Kolarov; De Jong, Milner; A Johnson, Tevez, Silva; Balotelli.
"I am fine with Roberto Mancini,'' reflected Bellamy, who joined a new club and the diplomatic corps on the same day.
"He's a top manager and he's brought in top players and I am sure they are going on to win that title. I have come down to the Championship, probably the hardest decision in my career.
"I know it will be a tough, tough time but I have the opportunity to get my home-town club into the top flight.''
If in need of reassurance, Bellamy should buy the latest Mojo magazine to read Plant's interview - he was soon back in the limelight.