According to a criminal complaint obtained by the Washington Post, Conrad Hilton is facing up to 20 years in prison for allegedly threatening flight attendants and passengers during a flight from London to L.A. last July. The complaint includes a detailed timeline of Hilton's alleged misbehavior during the flight, which quickly devolved into a hellish 11-hour nightmare.

From the Post:

It all started about 30 minutes into the flight when flight attendants were about to start drink service on the upper deck, but they couldn't because Hilton was standing in the aisle blocking their path.

One flight attendant described Hilton as flying from "one tirade after another," throughout the flight.

He complained that the flight attendants were ignoring him or "taking the peasants' side." He whined about being upset because he broke up with his girlfriend, one flight attendant said.

Hilton's bizarre tantrums allegedly held up drink service in the flight for more than 40 minutes as the 20-year-old paced up and down the aisles, threatening male members of the flight crew. At one point, he allegedly attempted to punch a male flight attendant but missed by "about ten centimeters." Hilton also threatened the flight's co-pilot.

"If you wanna square up to me bro, then bring it on and I will fucking fight you," he told the co-pilot, according to the complaint.

Later in the flight, Hilton reportedly accused a male passenger of giving him the "stink eye," which Hilton said was an indication that the passenger wanted to "fight or fuck him."

At one point, the flight's co-pilot gave him a "final written warning," which witnesses report Hilton tore up. "My father will pay this out, he has done it before. Dad paid $300,000 last time," he allegedly said, adding that he's been banned from other airlines.

During his court appearance Tuesday, Hilton reportedly admitted to intimidating some of the crew. Again, from the Post:

In his interview with the FBI, the agent read Hilton the part of that law that would apply to this particular case.

"An individual on an aircraft in the special aircraft jurisdiction of the United States who by assaulting or intimidating a flight crew member or" the agent read.

Hilton interrupted him. "I did intimidate. But, through defense. He came up to me with his nose."

Hilton was released on $100,000 bond and ordered back to court in March.

[Photo via Splash News]