Just created a new amplified world to see how my computer would handle it, I guess not very well.

I saw a bunny on the side of a cliff, so of course I tried to punch it off. It ended up not falling and instead just floated in the air (not in the video). After flying around for a few seconds, I saw a creeper and tried punching it to no avail. It seemed as if I was in spectator mode, as it was still walking around (not in video). I just flew away and as I was flying, the chunks started glitching out around me pretty bad (in video). I show my f3 screen, but my settings are all pretty normal. I did reload the chunks a couple of times and it didn't change anything. I can try uploading the world for you if you want (don't know if the glitch will stay or not). http://youtu.be/Qn8uG7Ge9AM