Tyler raised the gun up and pointed it towards his growing brother, hand shaking nervously at the sight in front of him, he knew he had to shrink his brother back down, and fast, the last thing he wanted was David having even more size to lord over him, especially this much.
He quickly moved the guns slider down to the smaller end of the scale, he had no idea how far down he took a wild guess.
“There. This should fix things” Tyler spoke, looking up from the guns controls only to see his brothers head once again touching the ceiling even while he was sitting down, he had to be at least 17ft tall now and was still steadily growing larger before his eyes.
David on the other hand was enjoying his ever increasing size, when he heard Tyler's voice he realised that he didn't want to go back to his normal size, in fact the bigger he was the better he felt, he couldn't let his younger brother take this away from him, “Not so fast 'little' brother. You made me this big so you're just going to have to put up with my new size.”
With that David began to reach forward so he could snatch the gun away from the smaller purple drake, though it wasn't easy for him to move now in the small confines of the room.
When David reached forward it caused Tyler to panic, he pulled the gun's trigger and a green light shot out of it, striking the giant dragon's growing body, causing him to yell out a frustrated “NO!!!”
Almost instantly David's growth stopped and he began to shrink instead, within just a few seconds his 17ft of height became 15ft, then 13, then 10.
“Give me that gun!” yelled David, as he carefully moved over towards his brother. Tyler backed up against the wall before being pinned against it by his brother, “I said give me that thing!” he yelled once more and grasped Tylers arm, trying to wrestle the gun away.
By now he had returned to his original height of 7'3” but was still shrinking even smaller.
David was shocked and paused for a moment to look at his body as it continued to shrink, seeing his younger and smaller brother slowly growing in front of him, “W...What the hell have you done?” he said as he grabbed Tyler's arm once again and tried to desperately get the gun.
Normally David would have no problem overpowering his brother, but Tyler was so determined not to let David grow back up again that he was able to keep hold. They both tugged the gun back and forth, each dragon trying with all their might to keep the size change device... Then David yelped as his vision went a pale green colour again. Through their wrestling one on them had accidentally pulled the trigger, and the barrel was pointed at David at the time, giving him a second dose of shrinking energy.
The shrinking sped up, a moment ago David was looking at Tyler eye to eye, now he was about level with the purple dragons chest and shrinking smaller by the second. All Tyler had to do now was hold the gun up in the air and push his brother away his foot, causing the shrinking drake to stumble and fall back onto his rump.
Tyler could only watch and laugh at the sight, “Who's the 'big' brother now eh?” he said smirking over as David dwindled down past the 2ft mark. He stepped closer so he could loom over now small blue dragon who was shuffling back, to get away from the towering Tyler.
David gulped up, shocked at this turn of events, though he pointed assertively up to Tyler and shouted, “Just how small and I going to get?! You better fucking grow me back to normal now or else!!”
Tyler simply smirked down again and stomped his huge foot near the now 1ft and still shrinking dragon, “Or else what? Short stuff”