Certamente; vemos a mãe de Harry fazendo dois exemplos em um flashback.
“Lily, don’t do it!” shrieked the elder of the two.
But the girl had let go of the swing at the very height of its arc and flown into the air, quite literally flown, launched herself skyward with a great shout of laughter, and instead of crumpling on the playground asphalt, she soared like a trapeze artist through the air, staying up far too long, landing far too lightly.
...
“But I’m fine,” said Lily, still giggling. “Tuney, look at this. Watch what I can do.” Petunia glanced around. The playground was deserted apart from themselves and, though the girls did not know it, Snape. Lily had picked up a fallen flower from the bush behind which Snape lurked. Petunia advanced, evidently torn between curiosity and disapproval. Lily waited until Petunia was near enough to have a clear view, then held out her palm. The flower sat there, opening and closing its petals, like some bizarre, many-lipped oyster.
Em ambos os casos, não há nem varinha nem invocação (a menos que o grito de riso conte), e Lily é a idade pré-Hogwarts, então é improvável que ela esteja usando feitiços conhecidos. Mas, em ambos os casos, o resultado é claramente a intenção de Lily; parece que a magia às vezes pode ser desencadeada apenas pela concentração / vontade / desejo; magia acidental parece ser um subconjunto disso.