Harry potter and the goblet of fire??!

Harry potter and the goblet of fire??

Why did Nevel make that face like what was going on when they were showing those 3 unforgivable curses??? Like what was making him do that? and did those 3 have any thing to do with the 3 challenges?

2 days ago
And also he was doing the curses on that bug but i thought they were illegal?? or are they only illigal when your doing it on a human?

Neville made the face when the cruciatus curse was being performed because it was that curse that killed his parents... He can't handle it.. (It was Bellatrix that did it by the way)

And no, the 3 Unforgivable curses do not relate to the Triwizard cup, but are used a lot in the coming books (obviously mainly by Death Eaters and Voldemort)

Imperio

Crucio

and Avada Kedavra