^I'll give that a shot, as it just turned itself off again with the fan facing the front of it (it ejected the disc before turning itself off this time). Hopefully it's just the heat making it spaz out. (The temperature was 29 celsius/ 81 fahrenheit at midnight!)
If worst comes to worst, Australia apparently has 2 year reasonable use warranties on most electronic goods these days, so I'll try and swap it for a new one, or if that fails, send it away for "Service" *shudders*. I've never had a console fuck up on me before.
Edit: A friend just told me that the PS4 eject and power buttons are very heat sensitive, and that is what may be causing the console to randomly eject discs and turn itself off. I guess it makes sense. Probably means I'll have to invest in some good ol' cheap air con if I want to play outside winter . This issue is really starting to highlight some of the PS4's design flaws for me. Just give me goddamn normal buttons, a proper on/off switch and an external power brick.