A Swing in Teslagrad is using the cloak to attract yourself toward an object but not actually touching it, with the attraction developing momentum to throw you horizontally across an area at high speed.
It is possible to swing across the red blocks in the Feast Hall, saving some time and looking very cool in the process.
Video[]
Ganobrator's demonstration on Twitch: http://www.twitch.tv/ganobrator/c/6430723