Disclaimer I don't own RWBY or the Flash, that honor goes to their perspective owners.

3rd person perspective

"You took a picture of us when you were up there?" asked Ruby.

"How fast are you?" Yang wondered.

"Well," (y/n) answered coming out of the lab with a suit "let's figure it out."

(This is the outfit you're wearing, you're the one wearing red)

"So what happened?" Jimmy asked.

"Well first I saw time slow down around me, then my hand started to vibrate, way too fast, me and Ruby did and experiment where I run around the Earth, but the timer barely passed the second mark." I explained.

"Well, let's find out how fast you are if circle around the Earth a hundred times." Katherine said.

"Okay." I responded "But won't this catch fire?" I wondered.

"No, because I made this with leather and textile, allowing the suit not to catch fire." Jimmy answered.

"Okay everyone stand back, (y/n) get ready." Katherine told everyone and (y/n) got ready to run.

"Are ready?" Jimmy asked and (y/n) nodded.

"Go!" Jimmy said, and (y/n) blasted off and became a red blur. (y/n) then finished the hundred laps that he was asked to do.

"I think I broke the sound barrier." (y/n) said randomly.

"Woah, that was crazy fast." Jimmy said in whoa.

"You went millions of times faster then anyone." Katherine said.

"That fast? By how much?" (y/n) asked.

"Well the circumference of the Earth that you ran around a hundred times is over 2490100 miles. You got back here in over 885111 seconds. Using the speed equation, speed is distance divided by time, you ran over 10127.95 mph, or over Mach 13.2." Jimmy explained.

"That fast?" (y/n) asked by how fast he ran.

"Wait, what?" Ruby asked not understanding a single word, causing (y/n) to chuckle.

"Okay, basically Ruby, I'm just as fast as you." (y/n) simplified for Ruby.

"Wow." Ruby said in silent.

"Let's go eat somewhere." Yang suggested.

"Alright but first let me change." (y/n) said, he then ran inside to change but once he got back outside he fell down.

"(y/n)!" Ruby exclaimed "(y/n), are you alright?"

"I'm fine, I just feel funny." (y/n) told.

"Oh no!" Jimmy, Katherine, Weiss and Blake realized.

"What... Oh no I get it?" Yang said in realization.

"What is it?" Ruby asked.

"He has burned through a lot of calories, going this fast means that he needs to eat more than he normally does." Jimmy explained.

"Right, I got it, so run fast, and I have a limitation." (y/n) understood "Let's just go somewhere to eat."

Time skip after lunch in your favorite restaurant

"Is it kind of weird that I still feel hungry?" (y/n) asked.

"You just ate (f/f), (s/f/f), and (t/f/f), how do you still feel hungry?" Ruby asked.

"I guess he needs more then we expected, literally." Jimmy answered

"Oh, do you think I can join Beacon?" (y/n) asked.

"Possibly, I mean we are almost at the end of the year, so you know what go ahead." Weiss answered.

"Awesome." (y/n) said in excitement, they then saw Cardin and his team.

"Hey there guys." Cardin said in hello.

"What do you want Cardin?" Yang asked.

"Oh, we were just looking for a guy that looks like this." Cardin said and showing a drawing of you in a blur, and everyone knows that it is you.

" We didn't see him." Blake lied.

"Yeah." Yang supported.

"We're just going now back to Beacon." Ruby lied as well.

"And we were going back to our homes, so see you all next time." (y/n) lied and team RWBY, Katherine, Jimmy and (y/n) went their separate ways.

Time skip to the lab 

(y/n)'s perspective

Me, Katherine and Jimmy got back to the lab after the encounter with Cardin.

"Okay, what was he talking about?" Katherine wondered.

"I might have did something to him when me and RWBY were in a cafe." I answered "But I just want to go to Beacon, seriously, look what I can do with this speed." Katherine then glared at me "But it is a huge responsibility and I could kill someone with this speed so I need to be careful."

"Much better." Katherine.

"Anyway, I'm going to give you something tomorrow." Jimmy said.

"What is it?" I asked.

"You'll see." Jimmy answered.

"Well, might as well go home, see you guys tomorrow." I asked as I was leaving.

"Bye." Jimmy and Katherine said at the same time.

The End