Sometimes as a goalkeeper you have a day where you're unbeatable. But this is a rare nadir that requires the perfect combination of variables.
You have to be feeling great, every shot is just within the outer reaches of your diving range and you have to make a big save early.
Due to the amount of luck involved, these matches are scarce — not unlike a no-hitter or perfect game in baseball — but not unachievable.
The most likely ending is a deflected shot finding the back of the net in the 85th minute, a result of luck finally running out.