"Is time travel fun, or does it hurt? I have so many questions–"
Future Twilight shoved her hoof into Twilight's mouth. "I have something extremely important to tell you about the future, and I only have a few seconds, so you've got to listen! Whatever you do, don't–" She vanished in a magical flash.
"Future Twilight? Oh no! What was she trying to warn me about? Her clothes, her mane, that scar..." Twilight held a hoof up to her face. "Oh, what a mess she is! ...I mean, I am... or I will be!" She gasped. "She must want me to prevent whatever horrible thing happens in the future!"
With another magical flash, Future Twilight reappeared. "Oh, good. It does work more than once."
"Are you...?"
"Don't talk to me. Don't say anything." Future Twilight stared her down.
Twilight gulped. "Okay."
"Now, whatever you do, don't waste your time worrying about some disaster in the future. I can promise you, everything will be perfectly fine, at least until after Tuesday morning." Future Twilight breathed a deep breath. "Ah. That's better." She looked closely at Twilight. "Got it?"
Twilight nodded. "Everything's fine through Tuesday morning. Got it."
Future Twilight was already beginning to fade away. "Good." She vanished completely, without a magical flash this time, just becoming more transparent until she was gone entirely.
Twilight blinked. She shook her head. "That's weird," she mumbled to herself. "I could have sworn there was someone else with me a moment ago... but I can't quite remember..." She shrugged. "Oh well. I'm sure it'll come to me eventually."