The lone Chitauri, holding a young man captive, slips through the portal. Seeing Iron Man there, and the nuke heading for the mothership, it circles around and heads to the Master's headquarters.
Thanos looks impassively at the sole surviving Chitauri. "You brought the captive?" He asks, his eyes glittering with malice.
"Yes, Master." the Chitauri replies, bowing its head and looking at the ground.
"I see." says Thanos. Turning his head from the alien to the unconscious man, he issues a single command. "Wake."
The young man wakes, and looks Thanos in the eye. "What do you want from me?" he asks, standing despite the pain throughout his body and the shackles weighing him down.
"You do not stand in my presence." says Thanos, angrily knocking the young man to his knees.
The young man gasps in pain, but still forces himself to look into the monster's eyes. "You did not answer my question." he says.
"You shall learn that in time." says Thanos, "But for now you need to learn to respect your betters."
The young man is dragged off and tortured but he never cries out. One thought, and one thought only allows him to hold down the pain. I will survive.