1.   I flipped from fury straight into hilarity and collapsed on the ground beside him, rolling around in helpless laughter too.

2.   The audience were in fits of helpless laughter.

3.   ...books that cause adults to burst into helpless laughter.

4.   I am terrified to look at them because I know I will collapse into helpless laughter.

5.   Hence this proudly obnoxious comedy is a hoot in every sense, deserving a smidgen of disapproval and a whole lot of helpless laughter.

6.   One surreal scene will guarantee that the reader can never again look at a curling iron without whoops of helpless laughter.