The first ever clip for Duncan Jones' mind-trip movie Source Code is out, showing us all exactly why Jake Gyllenhaal must travel back into time, and into the dead minds of the victims of a commuter train terrorist attack. To save Chicago!

Here's the official synopsis:

An action thriller centered on a soldier who wakes up in the body of an unknown man and discovers he's part of a mission to find the bomber of a Chicago commuter train.

Source Code will be in theaters April 1st.