Mimbulus Mimbletonia Accident

Book 6, Ron & Hermione are prefects, so they have to leave Harry. Ginny  and Harry look for a compartment; in the last wagon, they find Neville and he says that there's no space to sit in the train but Ginny tells him"yes, there's space for us, here's only Luna Lovegood; hey Luna, can we sit here?", Luna, who was reading the Quibbler says yes and looks at Harry carefully"aren´t you Harry Potter, don´t you?"; Harry feels uncomfortable,after a while of silence, Neville takes out his birthday present: a plant, Mimbulus Mimbletonia; he explains them that has marvelous defenses if it´s attacked, takes out a pen and pricks it; immediately, the plant produces a slimy green liquid and explodes it and the compartment fills of this slimy viscous thing. It´s my favorite situation. Cho comes and sees that´s a bad moment to see Harry, she says "hello Harry" and leaves. Harry feels ashamed, Ginny fixes everything and forgives Neville who feels guilty. What's your favorite situation? Comment below : )