happened to me last evening shooting. I thought I robin hooded it but took half the nock off. I had a spare that the insert was missing so I just switched nocks and it shoots fine.
If something happens thats usually what happens with me is the nock will come flying off. If the arrow don't tube the other one I've never had a problem besides the nock coming off or breaking the end of the arrow off I hit. Thats one nice thing about shooting Aluminums, you don't have to worry about an arrow blowing up when you shoot it if your slightly worried about something.