Elan is quiet in the hallway for a few moments, leaving just the sound of the room struggling to hold your ceaselessly expanding frame and your rumbling, lust-heavy breaths. The wood creaks under footpaws over three feet long, plaster is starting to spatter wetly onto the floor and furniture, and your own fluids are still dripping messily down the walls and onto the kitchen floor.
Your heartbeat quickens in arousal and panic. Your tiny apartment isn't going to take more of this, but "more" is the only thing your body seems to understand at this point.
"Goddamnit hurry Elan!" you shout, your voice stunning the walls and shaking loose things off surfaces in every room. You moan deeply as your cock punches a hole in the ceiling, your bullishly thick neck forced to curl as your shoulders start to push upwards too.
"OK!" is Elan's quick reply. Your huge, sensitive ears somehow manage to detect movement over the sound of your own stretching body. The whisper of the rug as it's slid to the side, the tiny, distinctive noise of the key scraping against the hardwood as it's being picked up, the...dull, odd crunch of plaster as your shaft finally pushes through the ceiling...
The sensation is mind-numbing, your tip surging through plaster and hardwood to punch into the apartment above you. You gasp with pleasure as your balls roil and swell, nearly thumping to the top of your footpaws with their sheer girth and volume. The last thing you hear before the ceiling finally splits over your shoulders is the surprised "What the hell...?" of a yuppie you've only seen in passing.
Now that your body has finally started to break free of its brick-and-mortar prison, your growth just seems to redouble. Helplessly you moan as your intensely muscular frame surges, your arms forcing themselves away from your chest as they balloon, your chest itself pushing your shaft down with its bulk. This in turn causes that rising erection to plow a longer hole in the floor upstairs, drawing a shriek from the yuppie's wife. You can hear them both coughing violently...your musk must be so thick up there.
Your height rises to 14 feet, then 15...then 16 by the time your back and shoulders rise along with your cockhead. Your massive face is the first to rise, and you see the couple huddled in the far corner of the room, staring up at you in disbelief. They look so small...the apartment here (or what's left of it, anyway) is already flooded with pre, great waterfalls of it cascading down into the apartment below. Impossibly sized legs and footpaws are filling that alone now, and you can feel your heavy tail bat down a wall with just a casual flick. Power and virility are just radiating from you, and it only seems to be growing more intense...
Elan's voice comes from downstairs, seemingly distant now that you're filling the apartment above as well. "What's happening, Kellan?" He sounds quite panicked, and you hear the door rattling as he tries to open it. Through your lustful haze, it occurs to you that you can shatter that tiny portal with but a flick of your tail...
And then your mind is brought back to your loins. Your shaft has been spurting nonstop since you've grown into the new apartment, splattering the walls with increasing force. Already it's reached the ceiling above your head, and your ears are following suit soon afterwards. Twenty feet comes shockingly fast, and your own balls are threatening to remove the floor around your waist completely as they start buckling the walls in your old apartment. Would Elan even be able to open the door, crammed as your apartment is?
The sensation of unending growth, of the rising power is just too much. Panic finally cedes to lust, and a wave of new warmth rides down your enormous frame. Your cock punches through towards the roof, and footpaws capable of covering a man completely splinter floorboards under exponentially rising weight. Suddenly...