"Jackson" would smile curtly as he stepped through the overly glossy portal to the human realm. It had been a little while since the last time he'd been to that side of the universe so it took the man of darkness a few moments to adjust before he transformed fully into his "Human" form. 
At this point, I, your continually employed narrator must mention a few things you might not notice unless you were a creature akin to "Jackson". The first is that the spirit world and Human world have somewhat different gravitational rules. On Earth gravity is a constant that must be obeyed, whereas in the spirit realm it is but a guideline you can choose to follow if you so choose too. This has lead to some awkward moments such as the last time "Jackson" visited Earth, wherein he left the portal, took a step forward, and fell straight onto his face. The second is that there is a different sort of atmospheric feel to the Human realm which is likely caused by the relative lack of magic. (Continued in second post)