Oncie didn't get soaking wet, as he expected, but instead landed on the bad Once-ler's desk with a bang.  The Once-ler shot out of his chair like a rocket. Oncie bounced off the desk and landed into a huge pile of money, sending green paper everywhere. The Once-ler's surprise turned to anger.
"Who are you?! Why are you here!? Do you know how long it took me to count all that?! Now I have to start all over!" He hopped onto his desk to glare at the intruder, only to be shocked all over again. Oncie rubbed his head and sat up with a groan.
The Once-ler stared at Oncie with his mouth open, stunned. "W-What the-? Why..? You...? Me...?! O-Oh my thneed....What is going on!?!?"
Oncie stood up, still rubbing his throbbing head. "Ouch...first my hair gets ripped out by an angry hippy, and then I land head-first into a desk...." He looked at the Once-ler, then smiled. "Hi. Erm....I guess I'm supposed to stop you from destroying the truffla forest."
The Once-ler just stared at him. He looked strangely pale, almost sickly. Then slowly, the color returned to his face, and he smirked. "Not gonna happen, buddy. Do you know how much money I'm making off those trees? More than you've -I've- ever made in a year."
Oncie blinked and tried again. "Please? You'll cut them all down!"
"I know. Do you think I'm -we're- stupid?"
"But what are you going to do when the trees run out?"
"I'll-" The Once-ler stopped mid-sentence. What AM I gonna do? "That'll never happen."
"Who knows? Maybe it will! You should stop now, before that does happen, and you'll save yourself from going bankrupt."
"Hey! This is my factory. You don't need to tell me how to run it."
"Technically, it's our factory."
The Once-ler growled. "You know what I mean."
"No, I don't. We're the same person, you should listen to me!"
"I'm not listening to anyone the Lorax sent!" The Once-ler shouted, turning red.
"Not even yourself?!"
"Not even myself!"
"Why not? Maybe you should listen to what others have to say, instead of shooting them down!"
The Once-ler's face turned an even darker shade of red, and he jumped on Oncie, anger flooding through him.
"Who are you to tell me how to run my business?!"
Oncie struggled, completely trapped by the Once-ler's legs. "Let me go!" He looked up at himself, fear in his eyes. "Please?"
The Once-ler glared hard at him, one arm raised to punch his younger self. Then he saw how scared he was, and dropped his arm and stood up, growling. "It's too late for you to go anywhere. You can sleep on the couch tonight."
Oncie slowly got to his feet and rubbed his arms. "Thanks."
"Don't mention it." The Once-ler said, still angry. Man, why was he so annoying at that age? No wonder his family didn't want him around!
Oncie pulled his first thneed out of his pocket and snuggled on the couch with it. The once-ler raised his eyebrows, then went to go sleep in his truffla-fuzz bed. What am I going to do when all the trees are gone?