"You win again, gravity..." *falls*
Or...
"Yellow matter custard, dripping from a dead dog's eye..."
Or something in tongues. You know, saying every word in a different language.
Oby deine madres burn en Enfer... "May your mothers burn in Hell". Yeah. Would freak out people that know 4 languages. And anyone who would understand any part of the sentence.
Or something from the Bible, best if from the Book of Revelation. Some cool stuff there. And it's more than sure to freak people out, if quoted right.
Jedoro said:
With my last words, I curse Zoidberg
Damn, could've thought of that. Last breath not wasted.