T800 Terminator

The T800 Terminator is a robot in the movie series Terminator.

History
On Comic Book Guy's list of greatest quotes of all time is "I'll be back", by the T800 Terminator.

Comic Book Guy also cites the "I'll be back" line as an appropriate quote for "attending to nature", namely, taking a bathroom break during a gaming session.

Behind the laughter
In the Terminator movie series, the "I'll be back" line is used by the T800 both in the first movie (as a villain character) and the second (as a hero character).