I have. A few years back I went to pick up a praying mantis (I had never seen one before)- a very pregnant looking female, and it bit me! It was a bite to remember, I shook my finger and it's powerful jaws just held on to the spot it had sliced through my skin. It hurt like hell and bled. So when the huge praying mantis pictured here landed on my foot (and was about as long as my foot) I just about pee'd myself in fear- opposite my usual Buddha demeanour around bugs I flung this guy off my foot as fast as I could. He landed in this dirty tupperware next to my compost bucket, where he happily discovered plenty prey to mantis on.