Anyone else get really excited while imagining stuff?

Pretty frequently my imagination will wander and then I'll start thinking of a game or show that I like and I'll imagine new story plot points and stuff. It's very visual and vivid to the point where I complete forget I exist in real life. While I'm doing this, without thinking, I start jumping, flapping my hands, and repeated flopping myself onto furniture. I only get brought back into reality because I eventually exhaust myself by jumping around too much.

I've always hid this behavior, but I've been caught a few times and whoever catches me is always like "What are you even doing? Are you okay?" So I feel like what I do is probably really weird to most people. I am Autistic, but idk if it's because of that or if I'm just weird cause I haven't heard of anyone else doing it. I'm curious if anyone else does this or something similar.