Once during camping, I got an extremely bad charlie's horse/hamstring cramp/howeveryouwanttoput it. It's where it feels like someone is basically taking a screwdriver, jamming it into your hamstrings, and twisting it all around, and having it pulsating. It was the middle of the night, and I tried my best not to scream.
That and one time, due to a wisdom tooth infection, I had extremely sharp pains when swallowing. That lasted for 3 days, and I swallowed frequently due to me having a lot of saliva.