This custom block will shatter (or change map16 if you change the settings + puff of smoke) after the player gets off the block. Good for platforming stages or places where you jump a lot to dodge stuff.
Unlike JackTheSpades's "Disappear after Jump", his version doesn't detect if the player is leaving the block when *walking off* the block (by getting off the block without the jump and spinjump button). Thats because blocks cannot perform actions while the player is leaving the block; it always run while touching the block.
It uses an invisible custom sprite in order to archive the effect that only runs when leaving the block.