The Fall of the Rebel Angels is ... one of very few that Bruegel painted in the style of Hieronymous Bosch, with whom, in his lifetime, Bruegel was often compared. Along with Mad Meg,and The Triumph of Death, it’s one of 3 paintings probably executed for an unknown private patron, in 1562. The quality and richness of invention bear witness to a familiarity with the world of demons that Bruegel shared with his Flemish countrymen. In these paintings it’s as if Bruegel’s demons are present not in some metaphysical terrain of horror, but the real world of Flemish villages, people and landscapes.
...Bruegel has depicted the origin of the demons when the Archangel Michael and his followers drove the angels who had rebelled against God out of Heaven. Falling to Hell, the rebel angels are transformed into devils and demons. They are naked, grimacing, tearing open their own bodies and farting in...
[https://gerryco23.wordpress.com/2013/07/29/in-pursuit-of-bruegel-in-brussels-and-antwerp/]