Ali_77's "Nightmare" drops us into a chase with no explanation. The opening line tells the reader, "you" in the poem, that they never have to face things alone, yet the next line shows exactly that: someone standing and staring, tearful and dirty, with nobody there. That gap between the promise and the reality gives the poem its ache.
The speaker feels pure panic. The repeated "faster and faster" makes the heartbeat and breathing seem to speed up as we read, and the short, clipped lines work like gasps. "Each step only takes you farther back" captures the helplessness of a bad dream, where effort gets you nowhere. The closing walls and the unheard scream add a sense of being trapped and ignored. Then the falling, repeated twice, ends abruptly with "Then it's over." That flat last line could mean waking up, or something more unsettling. The mood is tense and claustrophobic, with only a thin, uncertain relief at the end.