Put the summary of the bug you're having here

What I expected to happen was...:

I thought that I would enter a Minecart and be sitting inside it, able to look out and interact with the world around me.

What actually happened was...:
I was placed so that I was looking out from below the minecart. I could get the minecart to move by pressing the w or s key but I could not view my surroundings and interact with a stone button on a pillar (that I use to activate powered rails)

Steps to Reproduce:
1. Enter Minecart
2. Move by pressing w or s key (you will move normally, not falling through blocks or anything.

3. Press L-Shift to exit minecart.