beyond my comprehension("Everything is known, Colonel Walter," said Sherlock Holmes. "How an English gentleman could behave in such a manner is beyond my comprehension." (Sir Arthur Conan Doyle)ART Vancouver)
it boggles the mind(Leonid Dzhepko); it is beyond me(Leonid Dzhepko); it boggles the mind(- Вот он всегда так, – ворчливо, но не без гордости проговорила Жена. – Сколько он этих тостов знает – ну просто уму непостижимо! – "He's always like that,' said the Wife, not without a note of pride in her voice despite its peevishness, 'there's no end to the toasts he has up his sleeve – it's enough to make the mind boggle!" Taras)