I swear no one notices the fact that Loki has obviously been TORTURED
like no he’s totally doing this all of his own free will
Yep, totally. Not like he’s having problems walking, or is showing clear signs of exhaustion or anything.
SOMEONE FUCKING SAID IT
Added thought: You realize that out of all of the Avengers (including his own brother) only the Hulk was able to do any real physical damage to him.
He got blown up by both Phil Coulson and Hawkeye. He was thrown out of a skyscraper window (do you realize how thick those windows are?) by Tony’s suit. He got his ass kicked by his big brother (who is also a demi-god and physically stronger). Not a single one of those events caused him any real physical harm. Not. A. Single. One.
It took the Hulk to draw blood, to bruise him. And even after that, he was only banged up a little. (Consider how capable he is of walking next to Thor at the end of the film.)
Why do I bring this up? Because it is clear that he is significantly worse off physically at the beginning than any other time in the film—including the Hulk-smash. There is no question that wherever he came from, he was going through physical torture (and I’d wager mental torture, too).
What did those aliens DO? If the Hulk smashed around a normal human they’d be cleaning you up with a napkin.
Hulk smash + Loki = some scratches and…light/moderate short term discomfort. Loki + Chitauri mystery torture = fear, flinching, limping, general ill appearance, exhaustion.
Or was it coming through the portal that messed him up? Or both.