A few years ago, I had a salt and pepper chicken starter from a local pub. This came with an innocent-looking little red pepper, which I assume was just for decoration... but I ate it anyway.
I regretted it soon afterwards. I believe it was a serrano pepper: not the hottest ever by any stretch of the imagination, but still about 3 times hotter than a jalapeño pepper. It took the rest of my drink to get rid of the aftertaste!