Dan was stunned... he couldn't get his hand even almost all the way around this thing! It was almost as thick as his torso, and at least half as long, too. It wasn't equally thick all the way around, though. Holding his tail was like holding a small book: very wide on the top and bottom, and relatively thin in between. He had to bend over to reach the end of it down between his legs. It was an alien sensation to suddenly encounter so much of his own flesh so far beyond himself, and to find it in such an unconventional shape at that.
-- I can't believe all this grew out of me so fast! -- thought Dan, gently rubbing his paddle-shaped appendage with both hands. It had absolutely obliterated the seat of his jeans: denim was scattered around like confetti on the floor behind him, and he felt almost naked thanks to the gaping hole back there. Perhaps it should have hurt a lot worse ripping out of his pants, but Dan was quite thankful it hadn't.
"What on earth am I going to do with this thing?" he wondered out loud. There was no way he was going to be able to fit it into any of his clothes, and hiding it was just not going to possible at all. He let himself flap it up and down behind him, feeling some sturdy new muscles kick into action back there. -- I bet I could swim a hundred times better with a tail like this! -- he thought, not exactly thrilled at the prospect of swimming like a wild animal. Dan's pulse quickened as he faced the fact that his sister really was turning him into one, and there weren't that many kinds of animal it could be.