Citrus aromas.
When Mexican and Thai sativas are bred with Afghani indicas, the results are nothing less than being hit by a freight train. Trainwreck is a hybrid well- known for relaxation and euphoria.
More about this strain: Trainwreck

Trainwreck is a cultivar with mysterious origins, most particularly about the meaning behind its name. Legend has it Trainwreck was so named because the original cut grew on a hill the same summer there was a train crash in the Humboldt region. Other sources claim the strain was named for the immediate slam of mental invigoration it had on users, which hit the mind like a runaway train.