A friend of mine has recorded some sounds from warsaw underground train. Then i have procesed it with lmms to get something similar to dj scratching. Hopefully you'll find some use for it.
A strange glitch sound. I like to open applications and extensions, etc. In audacity by importing raw data. This is one of the more interesting results.
The result of a blending of a couple different sounds in figure53's qlab program made to sound like a violent needle rip on a record. Beefier than the common 'zipper' sound.