"It's a cardiac tamponade," Cristina looked to confirm after examining Mark's chest wounds.

"Are you sure?" Derek asked.

"Seventy five percent sure…Well…Seventy percent sure," Crisitna announced.

Derek and Meredith both looked up with puzzled faces.

"That's not very sure," Meredith replied.

"Well if you want me to be sure then get me an ultra-sound," Cristina remarked with sass.

Derek stroked his unconscious friends head as Cristina informed that they'd have to drain his pericardial sack and relieve the pressure or else his heart would stop.

"With what?" Derek wondered, as they put the oxygen mask over his mouth, "We don't even have an eighteen gage, spinal needle. Derek was holding a spray bottle when the idea came to him. "Take the top off," Derek said to Cristina. She unscrewed it with one hand and pulled the topper off.

"Use that," Derek pointed to the clear tube.

"Brilliant, brilliant," Cristina praised. They sanitized it and then cut a small hole into his chest for the tube to be placed through. Mark thrashed as it was done from the pain and began to hyperventilate.

"Try not to move Mark," Cristina held him down.

Meredith wove the short tube in through the bleeding wound as her husband and best friend warned her to be careful not to puncture the heart.

As Meredith thrust it in deeper a spurt of blood erupt from the tube and then Mark began to lurch forward while screaming.

"That's good. That means you got it in." Cristina assured.

"Ok we need to check on Lexie now," Meredith remembered.

"Right," Cristina agreed as she stood up to do so. She walked the few steps over to where the comatose Lexie Grey was lying and bent down next to her. "Her breath sounds are equal. That's fantastic. That means that the tachycardia has been resolved," She shouted out loud for everyone to hear. "Chest tube is clear. Perfect." Then Cristina pulled back the blue airplane blanket to examine her arm and legs. "Still some bruising on the legs, I don't think that it's from the compartment syndrome though. It's probably trauma from the crash. I wouldn't worry too much about it. The skin around the stitches on the arm are a little irritated and reddish. I'll just take care of that too make sure there's no chance of infection."

"Ok thanks Cristina," Meredith thanked as her and Derek finished their work with Mark. "We should transport them both. We need to be back at the sight of the crash so we can all be together and find a way out of this hell."

"How can three injured people carry two unconscious people?" Cristina stood up to ask.

"We'll make two trips," Meredith answered her question with a simple explanation.

"Well we can't leave one of them alone while the other is carried off. It's too dangerous don't you think?" She asked a follow-up question.

"Alright then, you stay with Lexie while me and Derek carry Mark. Then we'll come back and take Lexie and the rest of the supplies with us,"

"Fine," Cristina reluctantly agreed. She feared that if Lexie should happen to perish in the few short minutes they were gone it would be all her fault.

Meredith and Derek carried Mark back through the words on the stretcher they'd salvaged from the plane. He'd been regaining consciousness on the last part of their walk and had begun murmuring things like, "Lexie. Help. Wuh. She's. Where." In his neurotic state.

"Mark, Lexie's alright. She's not dead. Please don't put any more stress on yourself. You already gave yourself heart trauma. You had a cardiac tamponade," Meredith leaned towards Mark's face as she carried the stretcher to inform him.

"She's…Dying…Though."

"You don't know that Mark. She's just trying to heal herself. She's still breathing, still has a heartbeat….So she's alive," Meredith coaxed him into trusting her word.

"We're both dying," He then said.

"No you're both going to be fine," Meredith fired back.

"Just a few more minutes Mark. " Derek said, hoping it would shut him up.

"We're gonna die out here. In the wilderness….Like filthy animals," Mark whispered as he stared up at the sky.

"Stop it Mark. Stop with the negativity." Derek yelled at his friend.

"It's just reality is all Derek," Mark remarked at his friend.

"Sometimes impossible things happen," Derek sassed him back.

"We're here. Both of you stop fighting. You're in no condition to." Meredith cut in. Meredith and Derek struggled with their last steps towards Arizona as their weak arms struggled to support Mark's weight. Arizona was luckily still fully conscious. She was alerted as she spotted them walking towards her.

"Oh my God, what happened?" She asked after seeing Mark in his horrible condition. Derek and Meredith lowered him to the ground right next to Arizona.

"He had cardiac tamponade. Luckily we had Cristina though." Meredith informed.

"He's going to be alright?" Arizona inquired.

"We think so. He just needs to recuperate." Meredith assured with her best opinion.

"And Cristina's alright?" Arizona noticed the lack of her presence.

"She's fine." Meredith answered vaguely.

"And Lexie? Where's Lexie?" Arizona asked.

Everyone went silent, dumbfounded and caught by the otherwise simple question. "Where is Lexie?" Arizona repeated with worry from their silence.

"Lexie is dead," Mark shouted out, coming back into consciousness. Arizona pushed back tears and gasped.

"No. Mark. She is not dead. She is going to make it. I know she is." Meredith fought back.

"She's dying. We both are." Mark argued stubbornly.

"Mark, cut it out. You are not dying. We're not gonna let that happen," Derek fought him from where he was now sitting on the ground to regain his breath.

"Well what happened? Cristina only told me that it's not good. What does that mean?" Arizona further questioned.

Meredith gathered her thoughts and then said, "She was crushed under a large chunk of the plane, from the waist down. We managed to free her but... We don't know. We just can't tell yet. She hasn't woken up or show any signs of brain activity yet. Cristina's monitoring her as we speak. And me and Derek are going back for her right now. We're going to stick together and we'll get through this."