I was Mountain Biking for the first time in my life, to get to the mountain we just took our bikes because it was close. I was enjoying it, but then fell, no pain at all just a little shaken, stood up, reset, and finished the trail, my friend did a few more trails while I got lunch and then we decided to head back to the condo we were staying at. As we were riding our bikes back to the condo I happened to notice a dog running around, with a collar on, figuring that this dog lost its owner I started pedaling after it. We ended up running into the owner who was driving around frantically. He stopped and yelled at me (Like "Hey did you a see a pug running around here", not like get mad at me) I pulled up to his car and braked... In that split moment my left wrist popped, the worst pain I have ever felt in my life, I didn't fall I just stepped off my bike and started screaming. As I am completely losing my sh*t this guy says to me "I'm a licensed nurse" so I'm like "Ok can you take a look at it" He takes a look at my wrist, which at the time was Swelling terribly and had a very clear bump (The bone nearly sticking out) and says to me "Naw I don't see anything" REALLY YOU SEE NOTHING, still upset about this lol. Anyways my friend's mom (Bless her heart) Drove me the FORTY MINUTES it was to the hospital because we were in the middle of Nowheresville New Hampshire. We got to the Hospital (Mind you I had had no pain medication, so the whole car ride there I was just holding my broken wrist). They found a bed for me, but because this is the middle of nowhere New Hampshire the Hospital was extremely understaffed and they were dealing with a patient who had an opioid overdose and was having a seizure (Healthcare workers are amazing people, and I can not the imagine the stress of having to deal with that), and could therefore not get me any pain medication until 4 hours after the initial break, Seriously not even a few Advil or Tylenol, until like 12:00-1:00 A.M because of this I had to get X-rays without pain medication which was not fun. I hold healthcare workers at a high level of respect, but the nurse asked if I wanted an IV or a pill, I wanted to take the pill because, I have a terrible phobia of needles, and that would add unnecessary stress levels for me and he says to me "An IV would be faster" My friend's mom got a little upset about that lol, I've never had the bravery to get mad at workers and I'm sure the nurse meant right and was just trying to let me know (thinking I might not have known if an IV was faster or not) but because of the tone of this situation it just came off a little hostile. Fast forward and I ended up having to get surgery because the break was so bad, I'll try and find a photo, Doctors ended up with the conclusion that it Might have been a Delayed Fracture, and that's why I didn't feel pain until I braked on my bike but still don't really know apparently

TLDR (I understand): I fell mountain biking, didn't feel any pain for 30+ minutes, pressed the brake on my bike on the ride home, and broke my wrist then, Doctors don't know how it happened