Once,
in an online chat with fans, J.K. Rowling revealed that the third
scent that Hermione could smell emanating from
Amortentia (love potion) was the aroma of Ron
Weasley's hair.
When Fred and George Weasley
bewitched snowballs to bounce off of the back of Professor
Quirrel's turban in the Philosopher's Stone,
they were unknowingly hitting Voldemort in the
face.