Loki's POV
The Avengers were annoying Loki. Did they not understand what they had done? The Man of Iron was, as always, annoyingly light-hearted. Usually Loki could bear with it, it had been amusing to watch the other Avengers reacting to the man's comments. But when they were directed at his son, at Jokul, Loki would not allow it. With a single burst of green magic he knocked the irritating man out, sneering as his primitive Midgardian technology saved him. Then he turned to Captain America. At least this human wasn't going out of his way to annoy Loki, though soon enough Loki grew annoyed with this man also. How dare the Avengers get so cocky just because Loki had let them win once! If he had wanted to win their last fight then Loki would have just used the Tesseract on Fury when he had first arrived in Midgard.
He glared silently at the unconscious hero. Loki had suddenly come to the realisation that attacking them had probably not been the best of ideas. For the first time ever Loki found himself wishing that Thor was there, and not just because he needed a fall guy. Thor had somehow managed to befriend these annoying mortals, they trusted Thor. If Loki was the one to tell them he had no doubts that the only thing he was likely to gain was one of that green hulking monster's fists to the face.
Loki turned away from the fallen Captain America, he did not have the time to be regretting his actions he needed to find Jokul and make sure he was safe. Loki closed his eyes as he thought. Where would the Midgardians have trapped his son? There was only one place which made sense, the very same cell which he had been locked in during his stay.
Loki wrapped his magic around himself and teleported so he was standing in front of the large glass wall of the cell. The first thing he noticed was that Jokul was curled up in a ball, shivering. Loki surged forwards, not realising that the door was open even as he ran through it.
He crouched beside his son, even without touching him Loki could tell that Jokul was far too warm, nothing which would be dangerous for a mortal, but to Jokul his temperature was near fatal.
Loki placed a hand on his son's skin and allowed his frost giant magic to transfer cold into Jokul. As he did so Loki unconsciously froze the air around them, creating a perfect layer of frost around the interior of the cell.
Once Jokul's temperature had been lowered sufficiently Loki reached down and picked his son up. He turned around, meaning to walk out of the cell and find somewhere for Heimdallr to open the Bifrost but he stopped in surprise.
The cell door, previously open, was now closed and locked. On the other side of it the Avengers (minus the two he had already taken out) stood watching him. Loki glared at them.
"Well, that was easier than I thought it would be." Hawkeye said happily.