Sounds redundant but they are two different things. When you are hyperfocusing is untintentionally ignoring everything and being engrossed on a person or a task. When you are hyperfixating, you forget about the time, other unrelated sounds, and factors. Uh, sounds like they are the same, right?

I only drink alcohol occassionally. I have never tried illegal drugs nor will I ever in the future.

But when I'm enjoying something really interesting, it's like the time doesn't matter and everything else doesn't matter.

Things I enjoy - music, art and literature in different genre and topics, especially when they are mindblowing.

I miss the feeling so much.