I tap the craggy town walls to make extra sure they aren't fibreglass.
To be extra sure, some kosher wines are flash-pasteurized, that is, heated briefly to a near-boiling point.
And if you are Victoria Beckham and want to make extra sure, you sport a new haircut.
However, just to be extra sure, President Mahmoud Ahmadinejad threw in his media manipulation tool of choice: Iran's nuclear programme.
But to make extra sure, you need to reduce the entire block to a heap of smoking rubble, and demolish the nearby hospital as well.
One such voter explained, "I knew this was going to be a squeaker of a contest, and I wanted to be extra sure that Saddam got my vote.
Mr. Kyl just wanted to be extra sure and, in doing so, to force Democrats to take a politically charged vote.
"Receiving the transition fund, there's a risk of people perceiving that we'll become beholden to government, so we've been extra sure to sign up to things critical of [government] policy".
It is not enough for these sainted individuals to pass a law limiting working hours; they have to pass another law to make extra sure that absolutely everyone is packing up on time and getting their full complement of leisure hours.
Now when you're dealing with a company that includes the highly charged, idiosyncratic presences of stars like Christopher Walken, John Goodman, Natalie Portman, Marcia Gay Harden and Philip Seymour Hoffman, you had better make extra sure that they're speaking the same language.
Mr de Blasio's "biggest crime", he says, "apparently was telling his black son to be extra sure to do what the officer says when he's stopped".
