FOLLOW SHOT of caterpillar loader tractor hitched up to railway boxcar moving in railyard. CS of coupling mechanism as loader tractor backs up to hitch up boxcar, ZOOM OUT to MCS of caterpillar loader tractor. Driver climbs in and drives away. FOLLOW SHOT of loader tractor pulling boxcar, stopping and boxcar is uncoupled, ZOOM IN on loader tractor as it drives away. Various CSs of driver in cab of caterpillar loader tractor.