I am looking for a translation of 'en une seconde' which would carry the idea of extreme speed and at the same time be in a rather formal register. the sentence is the following: "je passais en une seconde par-dessus des siècles de civilisation". This is from Proust and I am really having a hard time translating it... I tried "in a flicker of a second", or "in a second", but it doesn't sound right to me... Thanks a lot.