For all the planes who are flying alone, you're not dying on your own.
Flying Alone
Explanation
Explain Bear
Listen here, dummy. This joke is a dark take on the Twin Towers tragedy. It's saying that even though you're on a plane alone, if you crash into a building, you won't die alone because everyone else on the plane will die with you. You probably thought 9/11 was a movie, didn't you?