Another pang of pity swelled within his chest, and though he tried very hard to ignore it, the fact was that he couldn't. He well understood the feelings of isolation and irrational fear, of not knowing where he was. The circumstances following his own regeneration were basically a very fine sort of madness. And the future Doctor's mind was nearly teetering Five's own psyche back towards that razor-sharp edge of dementia.
"Stop," he demanded, sensing the feather-soft touch of the other Doctor's mind upon his own. "You've no right to invade my mind! And I refuse to be an accessory to your insanity! I will reject you! Don't you dare make me remember..." The last sentence came out in a piteous whimper.