Idiom:

Quick buck ( easy money )

Hit the book:

Bang

Squish

Flip

Reverse

Chime

What was that bang?!

As you're coming into land, the wing flaps may be lowered again, and you'll "hear the wind like mad now". Leary adds: "If you are by a window, sometimes see the air is being squished so much, it leaves little vapour trails which follow the airstream over the wing."