There is something as double jumps! It's a glitch I think. The normal jump can get you over about 2 blocks. But the double jump can get you over 3 blocks or more. It exists and it's not lagg or a hack.
double jump can also take place if you are on and behind a block and hit the corner of the block you are jumping over an d while you are in the air it thinks you are on the block so it allows you to jump.
you can double jump. I know on marathon hold up as you hit the trampoline then hit up again when you can't be seen on the screen. I forgot how to do it on others, except crossroads, but it IS possible.