Four of Pentacles - Tower
internal combustion
internal - Four of Pentacles
combustion - Tower
Four of Pentacles hugs himself and stares straight ahead as he sits in a deserted place with the city 'way behind him. One of the things this card expresses is internal feelings, and then the internal part spreads to any application at all of that word, so here it appears for internal combustion of an engine. (It also says 'internal' in medical subjects.)
Tower depicts a lightning strike so powerful it ...