How can you make a triple jump? in some levels of the world record it makes a triple jump and I do not understand how to do that, it is supposed that only a double jump can be done

what you do is you do a jump that touches a wall as you are rising ( a really simple place to do this is 1-5). You can push into a wall, hit jump and after you have cleared the wall you can do two more jumps after that. If you are still having trouble let me know and I can put together a quick demonstration video.