then that statement doesnt make sense
[realm of us] -lots of distance- [realm where thats possible]
It makes sense if you think of different realms separated from each other by a great distance c; (I mean they've gotta be separated by something)
Or you can just think about it as "AC is very far away from the realm of realistic parkour"
I mean it would make less sense if I meant time, I doubt that any point in the future we will ever enter into another realm in which we are capable of breaking physics.