User blog comment:CircularBoat742/Brawl in the Family Extention/@comment-26651799-20170422174701/@comment-31563773-20170422174949

I believe this is because Lincoln's adrenaline was high enough to the point he didn't notice it. That, or he was in so much pain he didn't care until he realized he couldn't move his arm. Also, I think when you get a limb dislocated, the nerves are shot so you can't feel anything.