A Florida professor was arrested and removed from a plane Monday after his fellow passengers alerted crew members they thought he had a suspicious package in the overhead compartment.

That "suspicious package" turned out to be keys, a bagel with cream cheese and a hat.

Ognjen Milatovic, 35, was flying from Boston to Washington D.C. on US Airways when he was escorted off the plane for disorderly conduct following the incident.

Monday's incident is another example of other passengers essentially becoming the authority on terrorist activity on planes.

Recently, passenger complaints have resulted authorities taking action against innocent passengers who went to the bathroom too often on a flight and who were just being annoying.

In the hyper-sensitive world of flying, sneezing too often could get you kicked off a flight and questioned by the FBI.

Milatovic, who is a mathematics and statistics professor at the University of North Florida, was minding his business when other passengers turned into super sleuths.

Passengers reported hearing strange noises coming from a plastic bag. State police said later that the bag contained a set of keys,

a bagel with cream cheese, some other small food items, a hat and a wallet.

When confronted by the US Airways crew about his "suspicious package," Milatovic got on his cell phone. The crew asked him to hang it up and sit down. When he refused, he was cuffed.

Milatovic was also charged with interfering with the operation of an aircraft.