Hello Guest 'He blew his mind out' combines two phrases: 'blow your mind', as in your definition of 'mind-blowing', and 'he blew his brains out', which means 'he put a gun to his own head and shot himself'. The implication is that he shot himself; but in the next line it turns into a traffic accident: 'he didn't notice that the lights had changed', which means he either hit a vehicle that drew out in front of him, or was hit himself. So we probably have to take 'blew his mind out' as an exaggerated way of saying 'died'.
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AnonymousI know exactly what it means, because it is personal to my family.Sounds like 'ideas of reference' to me.