So here's how it went down:

I'm on a Delta Song flight from JFK to SFO. The plane is mostly packed. I'm towards the rear. Although it's around dinner time, the lights are dimmed, and most of the passengers are asleep.

Somewhere over the Mississippi River

I get up to go to the bathroom. There's one person ahead of me, so I stand and wait. A man in the aisle seat of the last row starts shouting something.

"…can't believe you're doing this to me! …you guys are supposed to be helping me! …is a matter of national security!"

He seems to be shouting at the flight attendants, who watch him intently but do not answer. The man is pounding on the tiny TV screen from the seat next to him - the TV screen in front of him is off.

After I finish in the bathroom, the man is quiet but appears visibly shaken.

Somewhere over Colorado

The flight attendants are slowly bringing the drink cart down the aisle. They reach my seat.

"What is the matter with you people! Are you ignoring me?!"

It's the man from the last row again.

"You're taking your time with that damn drink cart! Hurry up and get to me! What is wrong with you people?!"

Several other passengers turn to look. I pass on my drink and put back on my earphones.

On the ground in San Francisco

Finally, we land. As we head towards the gate, a flight attendant gets on the loudspeaker.

"Attention, ladies and gentleman. As soon as we taxi into the gate, please remain seated. There is a security issue that we need to attend to, and we need you all to remain in your seats. Airport security personnel are going to board this plane as soon as we are at the gate. Please remain in your seats until you are told you can get up to deplane. This is a serious matter and I want you all to listen very carefully. I don't want any of you to get up and claim you did not hear this message. You all must remain in your seats until you are told you can get up again. Thank you."

As soon as the message is delivered, just about everyone's heads whip backwards (including mine) to the man in the last row. The man looks at his row mates and shrugs.

The man appears to be of mixed Asian/European decent. He is dressed in business casual attire and wears thick-rimmed glasses. I can't tell if he's been drinking or not.

Several security officers board the plane. A few remain up front while two walk to the back of the plane. They get to the man in the last row, the one who's been shouting earlier.

"Get up," orders one of the officers. The man gets up without any hassles.

"Turn around." As soon as he turns around, the officers cuff him.

"Do you have any bags in the overheard bins?" one of them asks.

"Yea, yea," the man replies with a nod. The officers open up several bins and point to each piece of luggage. The man shakes his head with each. I guess he didn't have any bags after all…

The officers walk him out, past the surprised & suspicious stares of the passengers. Several passengers eye the overheard bins.

In my hand the whole time was my Treo. I contemplated taking a photo, but decided against it in case the man really was a terrorist or mass murderer and started shooting us all or something.

A few moments later, the flight attendants called for us to deplane. We all rushed the hell out of there.