Never have i ever considered quitting... ive been tomahawked head over heals wincing in pain, but ive been fortunate enough to never have been injured on a snowboard... (knock on wood) now... on a football field? thats a totally different story... BUT it is the same mindset. Broke 3 ribs, tore my mcl, broke my arm, separated my shoulders multiple times, broke all 10 fingers, broke both hands.... Ive been doing it for 12 years, i went to college to prolong my career... 3 years from now when its all said and done will be the saddest time of my life...
If you fall get back up and try again... If it hurts take a minute to regroup, if it still hurts after a few minutes get back up finish the run, and go see firstaid... but if you can avoid it never take the ride of shame in the gurney!
It comes and it goes. Get it while it Lasts.