It’s an age old story. Boy meets girl. Boys loses girl. Boy thinks it might be because he was hypnotised by a crazed scientist who was swinging a brain on a chain. Boy thinks this might explain why the girl was originally a nun but changed into hallucinatory sex vampire.
Yes, it’s the video for mostly nonsensical ‘Trip At The Brain’, produced in 1988 by the skate metal pioneers Suicidal Tendencies.
I suspect it’s what might happen if you were the lead singer of a metal band who hallucinated evil neuroscientists while on a bad trip, or if you were a neuroscientist who hallucinated a metal band while on a bad trip.
Nevertheless, it remains one the finest examples of 20th century neuroscience, heavy metal and hallucinatory sex vampire art.
Link to video of Suicidal Tendencies’ ‘Trip at the Brain’
Mind Hacks 
Is that a cameo by John Cusack at the 3:17 mark?