The Doctor jogged around a sharp bend in the dark tunnel in which he was currently imprisoned, bumped into someone hurrying towards him, and started to mumble an apology. Then, looking at the other person's face, he recognised himself. Only he was clad in a blue suit instead of his usual brown pinstriped outfit.
"Hello there," he said brightly. "It really is fortunate that I ran into me like this. Two of me can't help but solve my problems in a very intelligent and quick fashion, unless we encounter even more Ice Warriors, which is always possible given the nature of my existence, but even in that case the two of us will still be quite useful, I'm sure you'll agree. I remember the time we had to fight Cybermen whilst armed with only a toothpick and a - "
The older him succinctly said, "Shut up," and proceeded to give the current him something to occupy his mouth to keep him from talking.
Yes, the younger Doctor reflected while he was still able to think clearly, sometimes wisdom did come with age.