Just read a nice anecdote in a Dutch cyclomag. It's Mario Cipollini's favourite memory of Marco Pantani.
Pantani was intrigued by Cipo's leightweight wheels and asked whether he could try them. Cipo didn't object; but Pantani's sponsor wouldn't have him advertising the competition's gear. During one stage, the Lion King and the Elephant stop and secretly exchange their wheelsets. Pantani is so thrilled by Cipo's generosity that he offers to wait for him, so that they can finish this hilly stage together. No, says Cipo, you just ride on. If you wait for me, you won't finish before tomorrow evening.