(Our test case was an object bouncing around in a rectangle, making a bounce sound every time it hit a wall.)
(Our test case; was; an object bouncing around in a rectangle) (an object; bouncing around; L:in a rectangle) (it; hit; a wall; T:every time)
Our test case an object it
was bouncing around hit
an object bouncing around in a rectangle
L:in a rectangle
a wall T:every time