Originally Posted by Xpecial
When you start the stage, you have this red ball circling you, when you don't attack that ball thing slowly charges up into a full circle. Each time you boost, you use some of that (basically encouraging people to not hold the attack button 24/7).
IGN: Xpecial / Bran
Well that explains a lot, I was being lazy in the morning and just holding the attack button most of the time. Explains why I randomly get short bursts.