It refers to the scene in Terminator 2 when the T1000 pries open the elevator doors. In setting it is two opposing gastons held at the same time. Keep the rules of ergonomics in mind and never set a gaston at full extension or full compression.
Here's a problem I set that got into a double-gaston position (elevator doors?) with a heel-hook to a gaston intro. Careful of putting the gastons too far apart - even a few inches can make the position way more strenuous.
Where you put the feet is critical or they can simply layback one hold or the other. It's good to have dual texture holds for this so the only usable surface is the vertical part. It make a really nice route if you put one side as a layback and pull onto the other side as a layback the other way and move through the elevator door move. This is accomplished by having the route move a bit left to right or right to left through that set of holds.