WATCH: Passenger Sucker Punches Flight Attendant on Flight Over Bathroom Dispute

We suppose that when you “have to go,” you just “have to go.” But for one American Airlines passenger, apparently the urge to “go potty” must have become rather overwhelming. No one is certain if Alexander Tung Cuu Le simply could not wait any longer.

Reports make no reference to the 33-year-old Westminster, California resident waiting for an “open window of opportunity” to use the economy-class restroom. Nevertheless, Tung Cuu Le wanted to use the first-class restroom.

If he didn’t really “have to go,” maybe he just preferred the softer side of the paperwork. Regardless, when the flight attendant refused to allow Tung Cuu Le to use the “first-class facilities,” he lost his marbles.

As the flight attendant turned his back on Tung Cuu Le, he sucker-punched him in the back of the head. He then turned and raced back to his seat, as if maybe he thought no one would notice that he had just physically assaulted someone.

Fellow passengers did notice. They restrained the combative Tung Cuu Le until the flight landed. Once on the ground at LAX, the FBI took over the investigation. The FBI is responsible for incidents that occur in the air.

Tung Cuu Le was detained on suspicion of interfering with a flight crew. This is a federal offense. The crazy incident happened on flight 377 from San José del Cabo to Los Angeles International Airport (LAX).

The Association of Professional Flight Attendants (AFPA) issued a statement. The union organization classified the incident as “dangerous” and “life-threatening.” However, and most disturbing, the union indicated that this is part of an alarming pattern.

Julie Hendrick is the national president of AFPA. She said, “This violent behavior puts the safety of all passengers and crew in jeopardy and must stop.” We suppose Tung Cuu Le really had to go.

However, most people have enough composure not to drill someone in the back of the head when they deny access to the potty. Hope Tung Cuu Le isn’t denied potty access when he’s booked into prison. That might prove rather embarrassing for the poor fellow.