Flies on a broom?

lol ok so me and allison were sitting there watching tv, not saying anything. Allison is also working on her homework. Then out of the blue she says "So what should I do for #18? Flies on a broom?". I'm just sitting there, staring at her. I'm like, wtf? Has she totally gone crazy? "Ok Allison, lets stop for a minute and think about what you just said." (silence ensues for about 30 seconds) Then Allison starts killing herself laughing. Supposedly she was defining words and she wanted a definition for witch. Whether or not thats what she really was trying to say, I'm not sure. But it was pretty funny.