Surprises are adrenalizing. Likewise obsession, movement, risk. I suppose, running the parahermeneutic gamut of the poem, one dilates or, basically, one is asleep.
Uxudo, written by Anne Tardos in English, French, Hungarian, and German in 1999, plainly disincentivizes napping. To the contrary, balancing the affordances, entailments, and opacities of four languages at once is liable to nudge the gland: surprise, which is to feel something that could not previously be expected.