Give me your worst!

Make a worst case scenario, answer a previous one, or you can do both.

You're in the Atlantic Ocean in a shark cage with a friend of yours. The people on the boat are worried since the two of you have been down there for quite a while now and can't raise you back up without a signal from your radio. Underwater, the bars began to rust. Seven great white sharks surround you and constantly attack, bending the cage. Your friend dropped the radio when frightened by the sharks. The top door is loose and you just realized that you had the flare gun with you, but you can only use it once. The flare should scare away the sharks, but something bigger might come. Oxygen is running low for the both of you, making it harder to breathe. The water presure is also taking its toll on you two. What do you do?

 

kick open the door thats loose, push my friend out, take the oxygen for myself and shoot him with the flaregun so the sharks go after him while I swim away

 

the earth is about to blow up, and you have no means of getting off of it, what do you do

 

kill the guy asking me the question XD