Caught my tips last year after under-rotating a backie into what I thought was deep powder, but was maybe only 20cm max and then ice underneath.
My only initial symptoms were a nasty nosebleed and a sore neck and shoulders, whiplash basically. Nothing too bad.
Fast-forward 18 months, my neck and shoulders still ache and my upper muscles are super tight, I feel this pretty much 24 hours a day, 7 days a week, and have done since the accident.
I've tried physio & chiropracticy, nothing has solved it. I feel like I have to accept I've now got chronic whiplash and will probs have to live with this for the rest of my life. I'm 26 but every morning when I get out of bed I feel like I'm 50 as I can barely move my upper body. I probably stretch 10x a day to try and release the tension.
Thankfully it hasn't stopped me skiing or biking, or any sports for example, It's not exactly a life changing injury like some of the above, but the fact that it's constantly there, even ask I type this message, really gets me down sometimes.