Why is this an apt comparison, "i saw a billowing white cloud enter the backyard, like an angel of death.

Because a billowing white cloud is like a roll of steam and angels have the ability to fly like steam and have the wings of white so therefore it is similar.

Eminem dropped out because he failed freshman year 3 times.
johnny depp dropped out to pursue his career as a rock star.
seth rogan dropped out because of his comedy career.
jim carey dropped out to support his family and to pursue acting.
ryan gosling dropped out to be on mickey mouse.
cameron diaz dropped out to be a model.