Unfortunately, Tsarukyan was kicked off the plane for not adhering to the basic rules of commercial air travel. Sit down, buckle up, turn off your handheld devices, close your tray table, and put your seat in the upright position. When everybody follows those instructions, the plane departs on time.
When they don’t, you get this:
“On April 16, American Airlines flight 513 returned to the gate at Los Angeles International Airport (LAX) for customers who refused to follow federal regulations,” American Airlines officials told MMA Fighting. “Safety is our top priority and we expect our customers to comply with crew member instructions while on board our aircraft, which include staying seated while the aircraft is taxiing.”