It had been two days since Gravis first tested his new Lightning Board. During that timeframe, he rode around nearly all day, trying to get used to it. He learned how to turn better, accelerate faster, and fight while on his Lightning Board.
Though, fighting while on the Lightning Board was complicated. Melee attacks were nearly impossible to perform, and any big swing had significant consequences for Gravis' balance. On top of that, not being able to do sharp turns took away Gravis' flexibility. Gravis could probably only use the board for chasing people or fleeing from them.
But Gravis didn't mind it that much. His body and lightning were already perfect for instant acceleration and sharp turns. If he also concentrated his lightning on his feet, his acceleration would even become unreasonably fast. The Energy cost for that was rather high though, but he guessed that there was no one able to accelerate as quickly as him on his level.