Here are some simple twisted spiral horns and the OpenSCAN file used to generate and animate them. Adjust the properties in the OpenScan file to make your own variations on the default horns, along with your own animations if so desired.
See animation here: makeagif.com/i/THeBFN
Rev. Orig - July 10, 2014 - one way to make a twisted spiral horn like mesh
Rev. A - July 12, 2014 - improved Thingiverse Customizer support