And Zach may find his fist connecting either with nothing or the wall just behind, if he's swung too hard. He knew he'd been provoking a hot-headed man - he knew Thor well, after all - and predicting that a punch would be thrown hadn't been a stretch. So Loki had already moved himself away, leaving behind an illusion which now vanished as the fist went through it.

Nearby Loki reappeared, smirking. "Nice try."