(phew... that was a huge hassle)
That should give you an idea on my somewhat weird and strange problem on my LG G2.
So, I have had my G2 since 2014, has worked surprisingly very well with very very little problems. But just recently I upgraded to Lolipop, was fine for a day or so and this problem suddenly appears. Initially, I was checking my phone and browse the internet, as usual, then I was surprised that my screen moved and jumped like crazy (exactly shown in the video). I was first baffled with this and wondering "what the hell is wrong?". Alright, so I soft reset my phone straight away after that and... Still the same problem. From that time I had been thinking that this could be a serious problem.
The problem started yesterday and is still there even now (with smaller frequency), now I want this to be fixed and I don't know where should I begin. I don't think it's the update that caused this because it was fine for a day or so and no one else got this problem (after updating). I am seeking for your help, anyone?