If this load centroid is behind the elastic axis of the wing structure, then a nose-down twist of the main wing surface results.

You put tea leaf and hot water into first part of "Tea-time", twist the timer to set the steeping time and the ready tea slowly trickles down to the bottom beaker.

DBUnit is about maintaining database integrity across test runs (and in fact you can use DBUnit as part of the set up and tear down of your tests in Twist).