Spring Jump

Spring Jump is Sonic's up special move in Super Smash Flash 2. Sonic steps onto a spring, launching him into the air. When used in the air, the spring becomes a weak projectile. The spring has yet to be programmed to work like a projectile in the demo, and only appears briefly during the execution of the move. Unlike many other up special moves, Sonic's does not leave him vulnerable and helpless afterwards, allowing him to attack immediately. This move, which acts as Sonic's recovery, provides decent vertical height. It can also provide considerable horizontal recovery when controlled with the arrow keys.

Trivia

 * There is a glitch in which if Sonic uses any attack (with the exception of his down aerial) immediately after using his up special move, he can use his up special move again, making him have an infinite recovery. This was later removed in the v0.6 demo.
 * Much like Link's Spin Attack and Mario's Super Jump Punch, Spring Jump was improved, recovery wise, from its Super Smash Bros Brawl counterpart. It allows Sonic to move freely during both the rise and the fall, unlike SSBB, where he could only control the direction after peak height was reached.