The human body is a marvelous machine when well-maintained. When stressed, it's an exhibit of autonomic physical comedy.
When I'm really sleep-deprived, I stutter uncontrollably.
After a recent earthquake, I had motion sickness and vertigo for the rest of the day.
If I'm really angry, sometimes I spontaneously burst into tears, which makes me even angrier.
And yeah, beets are really sneaky and scary, and also scary tasty, and tasty things normally wind up in my belly. And beeturia ensues, which makes me think I'm seriously ill... until I remember I'm a vegetarian and eat weird food.