A viral confrontation on an American Airlines flight showed how quickly rudeness can lead to removal. The passenger told a flight attendant to "shut up" during pre-flight safety instructions and was swiftly escorted off the plane. @JayCrenshaw/Instagram The early morning flight originated in San José, Costa Rica, and was bound for Dallas, TX on Tuesday. The situation escalated almost immediately after the insult, as shown on the viral video posted on Instagram by Jay Crenshaw (@JayCrenshaw)....