In Men In Black he was just like, "I got this" and saved the earth.
In Wild Wild West he wasn't even worried about all that shit burning down.
He was also pretty casual about world salvation in Men In Black 2.
Will got SASSY while saving the entire future in I, Robot.
By the time Men In Black 3 rolled around he was like "uuughh." But he still saved us.
In I Am Legend, Will saves the world but not his canine pal so it's sorta win/lose.
Will Smith can even save shit when he's drunk, like in Hancock.
And Will saves cats, too! In Enemy Of The State he saves a kitty from certain death.
