• tarasā — quickly
  Instrumental of taras, 'swiftness, force.' Bhāgavata-Sanskrit's word for the speed of righteous action — used elsewhere for Hanumān's leaps, Garuḍa's flight.
• daśame-pade — on his tenth step
  daśama (tenth) + pada (step). The number ten resonates: ten sons per queen (verse 1), ten avatāras of Viṣṇu, and now ten steps before retribution. Sanskrit narrators use such number-echoes structurally.
• dantān — his teeth
  Plural of danta. The same teeth he had shown in verse 29 (dantān sandarśayan). Bhāgavata-narrative closes its loops: the laughing teeth become the broken teeth, one syllable repaying the other.
• vivṛtaiḥ — with openly displayed
  Past participle of vi + √vṛ, 'to uncover.' Names the rude exposure of the teeth in laughter — vivṛta-danta-darśana is a classical breach of decorum. Balarāma's response is precisely fitted to the offence.

• Which of my faculties — speech, sight, hands — am I using to mock rather than to serve?
• What gift might I lose by misusing it, and how can I redirect it toward devotion today?

Like a man counting his own teeth on the run — one, two, three — the Kaliṅga king reaches step ten and finds Balarāma's hand already on his jaw, the teeth he showed in laughter (verse 29) now spilling onto Bhojakaṭa's floor.