You need to push the switch that brings the crane to you then get on the boxes and use
reverse time to return the crane to where it was orginally. If you get this to work let me
know how because i cannot get it to work.

Use the x button to move the crane to your side, then freeze time and hod the x to start
the crane you will hill a click then jump up the crates and get on top of the crate that
is attached to the crane when time un freezes the crane will move to the otherside.