Here are a few topics that might help:
Boingy Boing tips? - Yo-Yo Tricks - YoYoExpert
Boingy boing? - Yo-Yo Tricks - YoYoExpert
boing e boingy - Yo-Yo Tricks - YoYoExpert
I found these by typing “boingy boing” into the search bar. There are more good help topics there if you need extra tips.
