What I wanted to and what happened:
Okay, so I was building this piston contraption (first part of the screenshot), a lift supposed to bring me 6 meters upwards by pushing me in a circle-like pattern. It bothered me that I got stuck (second part of the screenshot) very often when I tried to use this, however I've seen videos of this setup and I know It's supposed to work. Getting stuck implies not getting to the top floor which I was supposed to.

Trying to make sense of the issue:
After I've tried quite many times, I started noticing a pattern in when the contraption worked, and when I got stuck between pistons: It was depending on were I was looking. Whenever I looked straight down, it worked perfectly, and I only got stuck like 1-3 times out of 30-50 times. However, I ALWAYS got stuck whenever I looked straight ahead or in most any direction except from down or maybe straight up as well.

To make this bug occur:
I built a system of pistons like the third part of the screenshot, were pistons push you around in an order (The numbers on the screenshot) such that you would go up one block, then sideways one block, onto another piston which was placed one block higher than the first one (Which could push me another block upwards and a fourth piston could push you onto another (fifth) upwards facing piston).

I made 12 pistons push me around to get me 6 blocks/meters up (I.e. 6 pistons facing upwards and 6 piston pointing inwards/pushing me around). Furthermore, I made the mechanism so that the 12 pistons would extend at exact one redstone tick after the previous piston extended. The fourth part of the screenshot explains the mechanism.

Original Reddit post: http://no.reddit.com/r/Minecraft/comments/18m4k0/steves_hitbox_depending_on_the_camera_angle/