The bond these two have is incredible. Despite the fact that Sam desperately wanted to distance himself from all of it, he and Dean are so alike in the way they think, it's scary.<<< they probably thought up a plan before hand in case this ever happend
The fact that even though Sam is suffering incredible pain and fighting against his own mind, his head is turned to Dean in the ambulance because he hears Dean’s voice and he calms because of it. --> My heart? What heart?