Put yourself in someone's shoes ( think from someone else position )Hit the book:

　　Bumpy

　　Rev up

　　Tar strip

　　Mingle with

　　Altitude

　　Adjustment

　　Abatement

　　Descent

　　The bumpy wheels

　　Time to go. You'll hear the engines rev up as you start moving forward.

　　"You'll be able to tell if a wheel is a little out of round because the bump of the tar strips mingle with the speed of the spinning wheels as they speed up and go blump, blump, blump," says Leary. When the "slapping" stops, you're in the air.