Visualisation was happening, mhmm. In fact, Toby thought he'd... probably done enough of that. To an oustider, it probably looked as though he was just standing there, staring into the middle distance, probably being angsty... or maybe in pain. Which was close enough, because trying to remain focused was about ten times more pain and effort than any physical exercise.

Onto the actual SPELL, then. Toby FIIIIINALLY drew his wand from its holster and twirled it between his fingers, as was his way. He'd written the spell down earlier, but of course was no longer anywhere near his notes. Which, in retrospect, he probably should have gone ahead and cast 'Impervius' on before the activity started. Because... water and ink... not a great combination. He didn't cast it on his shoes (despite a lack of galoshes), either, for some strange Toby reason.

But yes, today's spell. He'd already sort of forgotten it, and had to kind of look around for clues or reminders as to what it might be. Maybe it was written somewhere, or-... ah, yes, everyone was SAYING it. That was a big clue. And a huge reminder. But hey, it had been an easy one to forget, okay? A very fiddly set of words.

"Aquatraxi Gravita," the Hufflepuff repeated for himself, nodding and visualising and trying his utmost to focus, which was difficult with so much going on in the room. "Aquatraxi Gravita... Aquatraxi Gravita..."

So, he had the words, he had the focus, and the wand movement was just a firm tap on the head, like the Disillusionment Charm. He practiced that, first on his palm, then on his head.

Okay, time to put it all together and... hope for the best.