I made a simple record player from a salvaged computer fan and 9V battery. The fan was spinning far too fast so I weighed it down with a heavy speaker cone, which was the right size to use as a platter for my hame-made record. The jerking motion comes from the motor attempting to turn against the friction of the stylus. The needle itself is a piece of copper wire pegged to a contact mic.
Below is a recording of the direct input.