On one end of the spectrum, I am baffled by the drama surrounding the "weird shit" happening to your body. I had the same stuff happening during my meditation but I didn't find it to be all that notable. Yes, after several days you begin to isolate tiny little sensations (like weak electric current) all over your body. It's really just that and nothing more though. I guess I question the value of that particular experience - is it really such a huge revelation that practicing a small task over and over makes you better at it, sometimes enabling you to do things you didn't think were possible?
On the opposite end of the spectrum, I feel like people don't give enough credit to the experience of forcing yourself to keep a position in spite of searing pain. I am preparing to give birth soon and one of the exercises for pain management is to practice relaxed breathing while squeezing ice cubes in your hands. It's painful but also incredibly empowering to learn that pain can be overcome, and unlike meditating for days to achieve a few weird sensations, it's a practical skill. You don't have to commit yourself to a 10-day retreat or practice a particular form of meditation to achieve that though, there is a variety of ways to do it, none of them particularly mystical.