"Two scientists walk into a bar, both without much money. The first asks the bartender 'Can I have some H2O?' to which the bartender nods.
The second says 'I'll have some water, too' and then he turns to the other. 'Why did you ask for it like that, though? We're not in the lab.'
'Dammit' says the first, 'now how am I going to kill you?'"
What do you feel is your greatest personality flaw?