Rambling pin
This fun technique based on the 1x1 round tile with pin was sent to me by Richard. It's one of the the smallest inverted 180 snot you can achieve - beaten only by it's sibling technique. The piece has many hidden secrets, which you can check out in a post on The Rambling Brick - Richard's excellent blog.
To find the different pieces needed for this technique you can search LEGO's online Pick-a-Brick for the design ID's. We link other market places directly on each individual piece page, which you can find below.
Examples
Here's an example of this technique in action.
