Barcelona 6-1 PSG (agg 6-5) (PHOTOS)

It was definitely the greatest ever comeback — it might even have been the greatest game of all time.

Barcelona were given mission impossible and they delivered with 30 seconds to spare — just enough time to get their entire bench of celebrating substitutes and coaching staff off the pitch — and for a heartbroken Paris Saint-Germain to take the restart.

'This is a crazy sport,' said Barcelona coach Luis Enrique. 'There is nothing else like it. In the 41st minute (of the second half) we were out, but people kept believing and with the two substitutes we got the goal.