Trailer teasers aren't just for surefire blockbusters anymore. Now, it is a bonafide trend that all movies are starting to follow. Today, we get a trailer preview from Looper, with the full trailer coming this Thursday, April 12th. Star Joseph Gordon-Levitt and director Rian Johnson introduce this first footage. Watch as Bruce Willis goes traveling through time to be assassinated by a younger version of his own hitman self (Joseph Gordon-Levitt).