Seamus Finnigan tried to cast it in 1991, and in his first attempt, he managed to make a "weak tea," before causing an explosion. The next day, he tried again several times, but only caused another explosion, creating smoke and blackening his face.
Behind the scenes
- It is unknown if this is a real spell or not, or simply a case of bangs-and-smells magic, although given that Seamus could turn the water into a weak tea, it is possible that it is, although he could not perform it correctly.
- Harry Potter and the Philosopher's Stone (film) (First appearance)