1. Set your camera pitch distance to maximum (with the command, not trough your interface options)
2. Fully zoom out
3. Drink a couple of brews that get you drunk.
4. Wait a few seconds (about 40 should do it)
5. Now you can zoom even further back.
This effect will go back to normal after a couple of minutes.
What really happens is that your screen stretches out, but you can zoom a little bit further back when it stretches out (give it time to let it fully stretch out so you can zoom even further back), when it un-stretches it will automatically zoom back in.