The Professor stopped and began to ask something of them, and didn't complete his question - the way he looked over Ambrose made the Gryffindor think he was referring to the hole he'd blown in the bank with his wand in anger. Expecting a detention, worse, or a drowning perhaps, he stayed still and the Professor became more interested in Moira, who Ambrose realised was further along the bank.
"Crap, Moira's hurt!" Ambrose exclaimed, getting up successfully at last and making a move in her direction, even if the Professor was already making brisk progress towards her. He slung a look back over his shoulder at Alvis, who he blamed for this of course.
"All your -"
Alvis Norling looked as if he could murder someone. Ambrose thought he was pretty pissed, but Alvis looked off the scale to the point Ambrose didn't finish his sentence and gave his classmate a funny look before deciding not to go there - probably the wisest decision he'd made in a long while.
Turning back, he hurried as fast as he could through the shallows to Moira, not caring that Storm would be there at about the same time.
"I'll take her to Madam Nagde, Professor, let me, Moira, you alright?" His tone was quite sharp towards the Professor but very soft towards Moira, as he dropped beside her and reached for her shoulder.
"Come on, Madam Nagde will sort you - I should have grabbed hold of you, I'm sorry - here." He shot the Professor a filthy look for a split second and feared for his neck a moment, but then shot another glance, not receiving the reaction he expected from the old wizard. Heaving Moira onto his shoulder, he gave it no further thought, more concerned with getting his close friend to the healer's hut.