Dean had been in a rush and it was close to one in the morning so he just went into the gas station, grabbed the first energy drink he saw, and then went back to the Impala.
He crawled into the seat glaring at his brother. Sam was asleep with his face hidden into his folded elbow. Dean would have blared music to piss Sammy off but even Dean was too tired to bother. Instead he shook his head then looked at what he had bought. It was a blue and silver can with red lettering.
"Red bull gives you wings" he said smiling to himself. It wasn't a very funny joke but when you were this tired everything seemed funnier. Opening the can he took a huge gulp not hearing the ruffle of feathers from the back seat.
"Hello Dean," said a gruff voice.
Dean jumped, coughed and somehow cussed all at the same time before spinning around to glare at Mr. Comatose.
"Dude what the hell! We got you a cellphone for this exact reason!"
Castiel apologized then looked at the drink. "What is that?" he asked tilting his head curiously.
"Red Bull," Dean said rubbing his eyes and leaning into the seat. "gives you wings," he murmured smiling again to himself.
"I…don't believe that is possible." Cas said fidgeting slightly.
"You can have it," Dean said holding it out to the back seat. "Tastes like crap." He added.
Castiel took the drink cautiously then looked inside the can. "You drink it?" he asked to make sure.
"Dude just drink the shit," Dean said tired of the angels' pointless questions.
Looking at Dean suspiciously he lifted the can to his lips then took a sip. Cases features scrunched up in disgust. "I do not care for the taste." He handed it back to Dean.
Dean took it and set it in the cup holder. "So what did you come off you're cloud 9 for-"
Dean was cut short when his face was smacked with what felt like a rock covered with feathers. He was shoved against the Impalas' door and that had been enough to wake up him, and Sammy, instantly.
"Dean what the hell!" Sam yelled trying to find Dean through the massive amount of feathers.
Dean ignored his brother and searched for a space that wasn't filled with fluff. He eventually was able to squirm between the seats and look into the back of the car where the angel sat with his mouth hanging open in shock.
"These yours Cas?" he asked trying to spit feathers out of his mouth. "Cas!" he said pawing at the angels coat when he didn't get a response.
"I…um…" he stammered looked around then nodded quickly.
"Mimpufindemblag" Sam had said mouth full of feathers.
"What did he say?" Castiel asked trying to see Sam under his wings.
"He said," Dean said trying to push the wing away with his knees. "Mind putting them back!"
Castiel looked down, cheeks blushing with embarrassment. "I'm very sorry." He said then was gone. Taking his wings with him and leaving one shocked Sammy and a very tired and annoyed Dean.
"What the hell was that!" Sam asked pulling feathers from his hair, mouth and a few other places he wishes I not write about.
"Red bull," Dean said pulling the can from the cup holder surprised it didn't spill. "Gives you wings."
A/N: For the next week Dean spent most of his time picking out feathers from in-between the seats of the impala. Sam spent it getting them out of his hair. By the end they had a good two-pound sack of angel feathers. They actually sold well to some religious nutcase who believed them to have health properties. Castiel wasn't very happy about that.