Minecraft on drugs.

Warning, this may make you puke. 

You can achieve the effect above by combining the GLSL Shaders mod with this custom shader, which you install by copying it to a txt file then rename the txt to “base.vsh”, then making sure to backup your existing base.vsh, dragging it into the shaders folder located inside your minecraft.jar (once the GLSL shaders mod is installed of course).