When I was very young one of those gigantic black hairy bees (carpenter bees, I believe they're called) landed straight on my nose. It didn't stop buzzing its wings even though it had landed, so all I saw was this big black, strangely fuzzy blob in the middle of my vision that was buzzing incredibly loudly. It may have only stayed on for a second or two, but I'm still terrified of bees (and any other flying insect that can bite, sting, or whatever) to this day.