Celestia took a sip of tea, admiring the flavor. Enter a vacant looking Luna.
"Are you ok sister?" Celestia asked. Luna sat down across the small table from her sister, though not looking directly at Celestia.
"Harmony apparently never learned he was younger than us during that time." Luna said, voice sounding hollow.
"I'm sure we told him at some point..."
"No... he only realized it recently... and it apparently took precedence over my little 'tantrum'." Luna sighed. Celestia began to snicker.
"Oh is that what we're calling it now? Because it's quite an apt. name." Celestia joked. Luna returned to reality, and glared at her sister.
"No, that is not what we're calling it." Luna shouted.
"I seem to have hit a nerve..." Celestia said. Luna pouted, and folded her fore-hooves.
"No, I don't think it would have hit a nerve. After all, it's not like I was completely alone for 1,000 years, or anything- oh wait..." Luna sarcasm-ed.
"You tried to end the world." Celestia monotoned.
"I did not!" Luna retorted.
"You do realize, that without the sun, there would be no light for crops to grow. Without crops, all life would starve. And if by some miracle crops did grow, there would be no warmth from the sun, and within days, it would be as if the windigos had returned, only during an argument separating everypony in Equestria from every other pony. Within weeks, we would all freeze to death. Within years, the very air we breath would freeze into a liquid." Celestia explained. Luna's mouth dropped open.
"But your telling me that. in the thousand years you were gone, none of that ever crossed your mind?"
Luna slowly shook her head.
"That's what I thought when Nightmare foalnapped me, instead of taking it all back. Good thing I had the foresight to create a back-up plan, or we wouldn't be here right now, isn't it?" Celestia smirked. "We'd be DEAD if Nightmare won... Well, I'm off to day court. Haaaaave fun with thaaaaat..." Celestia chirped, leaving the room. Outside the room was Cadence, barely containing her laughter. The two (once out of earshot) began laughing.
"Did you see the look on her face?" Cadence asked, in-between breaths. Celestia just nodded.
"And you said I couldn't play any practical jokes." Celestia snorted.
"I can't believe she fell for that!" Cadence laughed again.
"Yeah, It's not like she was going to destroy the sun, or anything." Celestia sighed, calming down.
"Wait, what do you mean by that?" Cadence questioned.
"Well, everything I said would have happened, had she destroyed the sun, instead of leaving it beyond the horizon." Celestia explained. Cadence's eyes widened.
"So... she really did almost end the world?"
"Yep." Celestia snickered. "TROLLESTIA STRIKES AGAIN!"