That is a rather peculiar effect.
He's seen a lot of magic before, and it looks nothing like it. It looks like it should be connected to something but whatever it is is too far away for him to even guess at what it might be. He doesn't want to metaphorically touch it - it looks fragile - but he's been looking at it for a good long while and has not really gotten very far. It seems to just be there, it's not actively doing anything, it's connected to wherever but doesn't seem to react to anything done around it (so not a spying device or whatever), it's... inert.
It's bizarre is what it is.
He decides to go poke it. Not metaphorically, physically. He gingerly walks towards it, reaching with a hand...
...but he's not looking where he's going, so he misses what happens when he trips on a rock, falls bodily into the thing, and finds himself somewhere else altogether.