With his eyes showing the way to the emergency room, Jackson was running as hard as he could, slamming objects in his path before reaching where he believed the blue light had reached. The worst case scenario was that Desmond would be killed by a creature in the hospital who then wrecks havoc whilst the others are still searching for Stephanie. Best case scenario was that Desmond gets Regeneration or something to that extent and can finally walk on his own. He finishes his run at the doors to the emergency room, bursting through and hoping that he wouldn't need a weapon, realizing that if he did he'd end up like in the fight with the crab, knocked to the side.