People forget that even god-like pilots are like the rest of us, and they make MISTAKES...
They could have been innattentive, not paying attention while yapping about what happened Saturday night, etc,etc...
Not to minimize this at all, but pilots are humans, too..
"Not to minimize this at all, but pilots are humans, too.."
Of course, but pilots are supposed to overcome some of those human limitations and not be so careless as to take off from a short runway.