Reddit user biff2204 was on a flight from Abu Dhabi, United Arab Emirates, to the Philippines when he awoke to a Muslim man shouting in Arabic at the top of his lungs, standing right by the emergency exist.
The shouts, which included several repetitions of "Allahu akbar" (God is good) may have been the last thing anyone in a post-9/11 world would want to hear on an airplane.
Even better, the Reddit user was able to capture the shocking incident on his cell phone video and upload it to the popular social media site.
So what happened next?
One user commented, "Yelling 'Allahu Ackbar' in a crowded airplane is this century's yelling "fire" in a crowded theater."
"I think anyone shouting next to an airplane's exit door is asking to be tackled, Muslim or not," another wrote.