I used to work for Machine Shop Special Effects, which was a cool place to work.
A few years later I went back and made this little project for them - a motorised rig to move a new folding phone.
Two follow focus units were built in, so that the phone could be manipulated accurately by the motion control guys.
I received the phonecall on the Sunday night, and the rig was built and filmed by Wednesday.
Here is a random photo from when I worked at Machine Shop...