Tonight I watched an episode of Mayday, a series I quite like because the detective work in solving airplane accidents fascinates me. This particular show featured a crew on a 727 chatting about not-flying stuff as they were waiting for take-off (a big no-no). One of them joked about crashing.
Then they crashed on take-off.
Be careful what you joke about.
Also, don’t get distracted in the cabin before take-off if you’re part of a flight crew and subsequently forget to change the flaps from the “plane will never get off the ground” position, especially when the take-off alarm system also happens to fail.