This is the dream in question.

I just wanted to see what people thought about this occurrence.

So my brother is a lucid dreamer, but doesn't post here and hasn't read much about it. Most of the information he has about it came from me.

So his ability to recall and control the dream world are lesser than mine, which should be accounted for.

Here are the parts with him in it.

I leave the bathroom and enter a room with hardwood floors, it is kind of a dumpy room that reminds me of one of my friends houses. My brother is present.
Joe is standing on some stairs and I run to him, and say "Joe! You are lucid dreaming!" He kind of chuckles and dismisses the comment, then I say, "Joe! You are!" And it looks like he realizes it, and has that Eureka! expression on his face.
Me and Joe are then leaving the mall, going to my car for some reason. I try to fly and fail, Joe does as well. I grab his arm and try to fly together and we float up for a bit then fall, like a super jump. Joe does this individually, laughing at the result. A guy in a motorcycle outfit(helmet included) attacks me, I kick him and elbow him in the helmet and he is knocked out. Joe and I fight a few more "bad guys" and then I wake.
I woke from this dream around 6am.

The next day, I asked my brother over text if he dreamed the night before. He said, "Yes, and I was lucid and summoned you into my dream."

Then I asked what happened in his dream, not telling him anything about mine and he said,

"I summoned you to the back deck, and asked you what the meaning of life is. You laughed as if I already knew and said Joe, There is no meaning to life". Then it ended.
He also mentioned that his dream occured early in the morning, before school. Which puts it somewhere around 6 or 7.

Just the fact that I had succeeded in making him aware of lucidity in the dream, then contacting him IRL and finding out that he had a lucid around the same time....kinda freaks me out, and excites me!

Anyone have a similar experience? Next time I hope to try and transfer a code word to him.