You never know when you’re going to need to make an impressive rumbling noise. Maybe you’re putting on a play and need some sound effects. Maybe you just want to make your neighbors really curious about what the heck you’re doing. No matter the reason, making a loud rumbly “Thunder Tube” is quite easy.
As Kludge shows us above, all it takes is a tube, some tape, and a spring. All 3 of those items can be varied in order to get different sounds, but generally speaking, the larger the tube and spring, the lower the rumble. What are you waiting for? Go make some thunder! 
