ok so I was unloading the bike out of the back of the truck, like I normally do it... but I also did a friends too, it was a 450x which is a few lbs heavier than my 450, I easily toss mine around though so I didnt think the extra 20 or so lbs would matter. I dont know if I lifted wrong or what, I must have, because HOLY SHIT does the middle of my back ever hurt. I can bend backwards, but forwards and side to side hurts like HELL. and when I turn certain ways its hard to breathe..what does my back have to do with breathing? I kinda want to go see a doctor, but im not a fan of sitting there for an hour waiting, letting them poke and prod me and tell me to go home and rest and come back. theyre a waste of time IMO. but a back injury is kinda serious. I was able to ride today though. anyone in here ever had this happen? Im hoping I just pulled a muscle and it goes away in a few days.