Heavily drugged with flu medication, I did the impossible.

I forgot to check in.

And I wandered past passport control and security till I reached the flight gate, and the attendant there was flabbergasted that I made it all the way without a boarding pass.

"Is this your first flight overseas?" he demanded to know.

Well, I would have thought my passport clearly answered that question. Anyway, they issued a boarding pass without sending me back past immigration and security (yes, it could have been embarrassing to explain how I got past everyone).

Like Dave said later, I could have made a good terrorist.