Brainwreck is 50/50 balanced hybrid strain takes the genetics of Trainwreck and combines them with the rare strain Brain Child (Williams Wonder x Jack Herer) x Brain Strain ). Some also say it’s a back cross of Afwreck (Afghani x Trainwreck). Either way, Brainwreck strain leaves patients feeling both euphoric and pain free. Because Brainwreck strain is originally offered in seed form the strain can display more of one parent than the other. Brainwreck strain is a patient favorite to medicate with after a long, busy day. Growing Brainwreck Marijuana Has Medical Benefits.