One thing that I have never heard of before is pressure springs. I have heard of many other springs but these springs sound pretty cool. After looking online at what they are I found out that they are very cool! I researched them so much and just found out that they are just like any other springs out there. Did you know that they have music wire? I never did but I should have figured that out since I played the flute, the violin (only for a short time though) and I played the triangle (hahaha). But springs are used for so many things that I never thought would use them before. Just like the springs in our beds (unless you have a temperpedic or Sleep Number Bed), or springs used for the trampolines. I loved springing on the ride Winnie The Pooh at Disney World. I felt like Tigger then!