As the colorful mare stumbled/stomped down the stairs of the hotel stairwell, Twilight noticed that Rainbow Dash looked like she had been run over by the train they were getting ready to board.
So, all in all, she looked slightly better than she normally did when she woke up in the morning. After all, she normally looked like she had been recently resurrected from the dead, with a mood to match the recently deceased.
"Coffee, Dash?"
The Rainbow maned mare gave a simple, exhausted grunt at the Princess' offer, but managed to nod nonetheless, before collapsing face first into a pile of soft, welcoming pancakes that Twilight had previously set up for herself, pointedly ignoring the fact that she was getting covered in syrup. And, all the while, Twilight watched in mild amusement, which was a stark contrast to the shock and disgust that was coming from both Rarity and Applejack.
"Dangit, Dash! Did ya get too heavy into the cider last night?"
Rainbow's response was as short as it was rude.
"Go ta hell."
The grumbled insult made Twilight roll her eyes, but regardless, she stood up, and moved to the nearby coffee pot, ignoring Rarity's affronted exclamation at Dash's "uncouth behavior."
It took a while for Twilight to come to terms with it, but the fact was that Rainbow Dash was not a morning pony. And, more-so, she didn't look like some fussy maned Fairy-tale princess when she awoke, either. No, she looked like she was consistently hung over, and typically had a mood that seemed to indicate that possibility. But, no, the truth was simple.
Rainbow Dash simply woke up, looking like hell. Every morning, every day. She didn't have nightmares from some tragic, unknown past, or had some disease that indicated that she was somehow dying, or at the very least, couldn't sleep. No, she slept well, all things considered, but, when she woke up, she looked like she fell down the stairs on her way to the breakfast table, hitting every step on the way down.
And, with that in mind, Twilight filled up a cup of coffee, added some sugar, and slid it over to her marefriend with a genuine, loving smile, watching as the mare clumsily grabbed the cup, and noisily/messily chugged it. The faster Dash could wake up, the faster they could go about their day.
And, sure enough, after a minute, Dash rose her head from the pancakes, and gave Twilight a grateful, if tired smile.
"Thanks, Twi."
"No problem, Dash."