Balachandran V's "Imprisoned" starts with a simple comparison: a prison is a cage, and the cage holds wild animals that can't be tamed. They aren't loud, though. They "lie in disquiet, quietly raging", which gives the picture a tense, held-in feeling. Their anger is so intense that the iron bars seem to melt in the heat of their "volcanic minds". The danger is all inside, burning against the walls meant to hold it.
Then the last two lines turn to the speaker. "Or like me" suggests the prison might be a better description of the speaker's own state. Where the beasts burn, the speaker is "frozen beneath / An inundation of emotions", as if buried under a flood. The poem shifts from heat to cold, from rage to numbness, and that contrast is its sharpest moment. The mood is heavy and trapped. The speaker seems overwhelmed by feeling and unable to move or speak, which may be a harder kind of confinement than the beasts' fury.