Reese's Peanut Butter cups. I used to LOVE them until I opened one that was filled with worms and eggs. Now that the THOUGHT of one makes me barf.
Stuff like that happens to me sometimes, but I don't avoid it forever -- I just look more closely the next time.
Reminds me when I was cracking open eggs for my mom and I was horrified and disgusted when one had a fucking
chicken inside it -- feathers and all!
...but I still love eggs!